When multiple APP files are provided (base seq=0 + delta seq>0),
fsdecrypt now automatically links and merges the differencing VHD
into the parent using Set-VHD + Merge-VHD (Windows/Hyper-V only).
Triggers a single UAC prompt for elevation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>