diff --git a/src/cmdb.c b/src/cmdb.c
index 70d83e4..3a0d951 100644
--- a/src/cmdb.c
+++ b/src/cmdb.c
@@ -47,7 +47,7 @@ void commandB0() {
 }
 
 void commandB1() {
-	int num = getCaliValue() - 1;
+	int num = getCaliValue();
 	int X1  = getCaliValue();
 	int Y1  = getCaliValue();
 	int X2  = getCaliValue();
@@ -64,7 +64,7 @@ void commandB1() {
 	nact->sel.wininfo[num].height = Y2;
 	nact->sel.wininfo[num].save = (V == 0) ? false : true;
 	
-	DEBUG_COMMAND("B1 %d,%d,%d,%d,%d,%d:", num + 1, X1, Y1, X2, Y2, V);
+	DEBUG_COMMAND("B1 %d,%d,%d,%d,%d,%d:", num, X1, Y1, X2, Y2, V);
 }
 
 void commandB2() {
@@ -75,13 +75,13 @@ void commandB2() {
 	int C3  = getCaliValue();
 	int dot = getCaliValue();
 	
-	if (num < 1 || num - 1 >= SELWINMAX) {
+	if (num < 0 || num >= SELWINMAX) {
 		WARNING("commandB2(): Window number is out of range %d", num);
 		return;
 	}
 
 	nact->sel.winno = num;
-	nact->sel.win = &nact->sel.wininfo[num - 1];
+	nact->sel.win = &nact->sel.wininfo[num];
 	
 	nact->sel.WindowFrameType = W;
 	nact->sel.FrameCgNoTop = C1;
@@ -93,7 +93,7 @@ void commandB2() {
 }
 
 void commandB3() {
-	int num = getCaliValue() - 1;
+	int num = getCaliValue();
 	int X1  = getCaliValue();
 	int Y1  = getCaliValue();
 	int X2  = getCaliValue();
@@ -110,7 +110,7 @@ void commandB3() {
 	nact->msg.wininfo[num].height = Y2;
 	nact->msg.wininfo[num].save = (V == 0) ? FALSE : TRUE;
 	
-	DEBUG_COMMAND("B3 %d,%d,%d,%d,%d,%d:", num + 1, X1, Y1, X2, Y2, V);
+	DEBUG_COMMAND("B3 %d,%d,%d,%d,%d,%d:", num, X1, Y1, X2, Y2, V);
 }
 
 void commandB4() {
@@ -121,13 +121,13 @@ void commandB4() {
 	int N   = getCaliValue();
 	int M   = getCaliValue();
 	
-	if (num < 1 || num - 1 >= MSGWINMAX) {
+	if (num < 0 || num >= MSGWINMAX) {
 		WARNING("commandB4(): Window number is out of range %d", num);
-		num = 0;
+		return;
 	}
 	
 	nact->msg.winno = num;
-	nact->msg.win = &nact->msg.wininfo[num - 1];
+	nact->msg.win = &nact->msg.wininfo[num];
 	msg_openWindow(W, C1, C2, N, M);
 	
 	DEBUG_COMMAND("B4 %d,%d,%d,%d,%d,%d:", num, W, C1, C2, N, M);
@@ -225,8 +225,8 @@ void commandB31() {
 	int *x_var = getCaliVariable();
 	int *y_var = getCaliVariable();
 	
-	*x_var = nact->sel.wininfo[no - 1].x;
-	*y_var = nact->sel.wininfo[no - 1].y;
+	*x_var = nact->sel.wininfo[no].x;
+	*y_var = nact->sel.wininfo[no].y;
 	
 	DEBUG_COMMAND("B31 %d,%d,%d:", no, *x_var, *y_var);
 }
@@ -236,8 +236,8 @@ void commandB32() {
 	int *x_var_size = getCaliVariable();
 	int *y_var_size = getCaliVariable();
 	
-	*x_var_size = nact->sel.wininfo[no - 1].width;
-	*y_var_size = nact->sel.wininfo[no - 1].height;
+	*x_var_size = nact->sel.wininfo[no].width;
+	*y_var_size = nact->sel.wininfo[no].height;
 	
 	DEBUG_COMMAND("B32 %d,%d,%d:", no, *x_var_size, *y_var_size);
 }
@@ -247,8 +247,8 @@ void commandB33() {
 	int *x_var = getCaliVariable();
 	int *y_var = getCaliVariable();
 
-	*x_var = nact->msg.wininfo[no - 1].x;
-	*y_var = nact->msg.wininfo[no - 1].y;
+	*x_var = nact->msg.wininfo[no].x;
+	*y_var = nact->msg.wininfo[no].y;
 	DEBUG_COMMAND("B33 %d,%d,%d:", no, *x_var, *y_var);
 }
 
@@ -257,8 +257,8 @@ void commandB34() {
 	int *x_var_size = getCaliVariable();
 	int *y_var_size = getCaliVariable();
 
-	*x_var_size = nact->msg.wininfo[no - 1].width;
-	*y_var_size = nact->msg.wininfo[no - 1].height;
+	*x_var_size = nact->msg.wininfo[no].width;
+	*y_var_size = nact->msg.wininfo[no].height;
 	DEBUG_COMMAND("B34 %d,%d,%d:", no, *x_var_size, *y_var_size);
 }
 
diff --git a/src/message.c b/src/message.c
index 1045428..20ca4f2 100644
--- a/src/message.c
+++ b/src/message.c
@@ -94,12 +94,12 @@ void msg_init() {
 	memset(msg.wininfo, 0, sizeof(msg.wininfo));
 
 	msg.winno = 1;
-	msg.win = &msg.wininfo[0];
-	msg.wininfo[0].x = 8;
-	msg.wininfo[0].y = 311;
-	msg.wininfo[0].width = 616;
-	msg.wininfo[0].height = 80;
-	msg.wininfo[0].save = TRUE;
+	msg.win = &msg.wininfo[1];
+	msg.wininfo[1].x = 8;
+	msg.wininfo[1].y = 311;
+	msg.wininfo[1].width = 616;
+	msg.wininfo[1].height = 80;
+	msg.wininfo[1].save = TRUE;
 
 	// Private variables
 	msgDecorateColor = 0;
diff --git a/src/savedata.c b/src/savedata.c
index 6207986..5ba2517 100644
--- a/src/savedata.c
+++ b/src/savedata.c
@@ -396,17 +396,19 @@ int save_loadAll(int no) {
 	sl_jmpFar2(save_base->scoPage, save_base->scoIndex);
 
 	for (i = 0; i < SELWINMAX; i++) {
-		nact->sel.wininfo[i].x      = save_base->selWinInfo[i].x;
-		nact->sel.wininfo[i].y      = save_base->selWinInfo[i].y;
-		nact->sel.wininfo[i].width  = save_base->selWinInfo[i].width;
-		nact->sel.wininfo[i].height = save_base->selWinInfo[i].height;
+		int j = (i + 1) % SELWINMAX;  // For savedata compatibility
+		nact->sel.wininfo[j].x      = save_base->selWinInfo[i].x;
+		nact->sel.wininfo[j].y      = save_base->selWinInfo[i].y;
+		nact->sel.wininfo[j].width  = save_base->selWinInfo[i].width;
+		nact->sel.wininfo[j].height = save_base->selWinInfo[i].height;
 		// nact->sel.wininfo[i].save   = TRUE;
 	}
 	for (i = 0; i < MSGWINMAX; i++) {
-		nact->msg.wininfo[i].x      = save_base->msgWinInfo[i].x;
-		nact->msg.wininfo[i].y      = save_base->msgWinInfo[i].y;
-		nact->msg.wininfo[i].width  = save_base->msgWinInfo[i].width;
-		nact->msg.wininfo[i].height = save_base->msgWinInfo[i].height;
+		int j = (i + 1) % MSGWINMAX;  // For savedata compatibility
+		nact->msg.wininfo[j].x      = save_base->msgWinInfo[i].x;
+		nact->msg.wininfo[j].y      = save_base->msgWinInfo[i].y;
+		nact->msg.wininfo[j].width  = save_base->msgWinInfo[i].width;
+		nact->msg.wininfo[j].height = save_base->msgWinInfo[i].height;
 		// nact->msg.wininfo[i].savedImage = NULL;
 		// nact->msg.wininfo[i].save   = FALSE;
 	}
@@ -472,17 +474,19 @@ int save_saveAll(int no) {
 	save_base->scoIndex      = sl_getIndex();
 	
 	for (i = 0; i < SELWINMAX; i++) {
-		save_base->selWinInfo[i].x      = (uint16_t)nact->sel.wininfo[i].x;
-		save_base->selWinInfo[i].y      = (uint16_t)nact->sel.wininfo[i].y;
-		save_base->selWinInfo[i].width  = (uint16_t)nact->sel.wininfo[i].width;
-		save_base->selWinInfo[i].height = (uint16_t)nact->sel.wininfo[i].height;
+		int j = (i + 1) % SELWINMAX;  // For savedata compatibility
+		save_base->selWinInfo[i].x      = (uint16_t)nact->sel.wininfo[j].x;
+		save_base->selWinInfo[i].y      = (uint16_t)nact->sel.wininfo[j].y;
+		save_base->selWinInfo[i].width  = (uint16_t)nact->sel.wininfo[j].width;
+		save_base->selWinInfo[i].height = (uint16_t)nact->sel.wininfo[j].height;
 	}
 	
 	for (i = 0; i < MSGWINMAX; i++) {
-		save_base->msgWinInfo[i].x      = (uint16_t)nact->msg.wininfo[i].x;
-		save_base->msgWinInfo[i].y      = (uint16_t)nact->msg.wininfo[i].y;
-		save_base->msgWinInfo[i].width  = (uint16_t)nact->msg.wininfo[i].width;
-		save_base->msgWinInfo[i].height = (uint16_t)nact->msg.wininfo[i].height;
+		int j = (i + 1) % MSGWINMAX;  // For savedata compatibility
+		save_base->msgWinInfo[i].x      = (uint16_t)nact->msg.wininfo[j].x;
+		save_base->msgWinInfo[i].y      = (uint16_t)nact->msg.wininfo[j].y;
+		save_base->msgWinInfo[i].width  = (uint16_t)nact->msg.wininfo[j].width;
+		save_base->msgWinInfo[i].height = (uint16_t)nact->msg.wininfo[j].height;
 	}
 
 	fseek(fp, sizeof(Ald_baseHdr), SEEK_SET);
diff --git a/src/selection.c b/src/selection.c
index d4f080b..d7e7062 100644
--- a/src/selection.c
+++ b/src/selection.c
@@ -117,12 +117,12 @@ void sel_init() {
 	memset(sel.wininfo, 0, sizeof(sel.wininfo));
 
 	sel.winno = 1;
-	sel.win = &sel.wininfo[0];
-	sel.wininfo[0].x = 464;
-	sel.wininfo[0].y = 80;
-	sel.wininfo[0].width  = 160;
-	sel.wininfo[0].height = 160;
-	sel.wininfo[0].save = TRUE;
+	sel.win = &sel.wininfo[1];
+	sel.wininfo[1].x = 464;
+	sel.wininfo[1].y = 80;
+	sel.wininfo[1].width  = 160;
+	sel.wininfo[1].height = 160;
+	sel.wininfo[1].save = TRUE;
 	
 	/* 選択肢を登録中 */
 	sel.in_setting = FALSE;