Bug found - with fix, taken from PM's.
Haha... you found a bug. Can't believe I missed that before release.
FIX: Open \Program Files\anrichan3_beta2\dgmpgdec150rc5\DGIndex.ini, set Use_MPA_Extensions to 1.
The new version of dgmpgdec is writing mpa as mp1/mp2/mp3. Anri-chan ends up using wavsource with mp2. Turn on the flag and it'll write the correct mpa extension.
Quote from The_Quiet_Man:
Haha... you found a bug. Can't believe I missed that before release.
FIX: Open \Program Files\anrichan3_beta2\dgmpgdec150rc5\DGIndex.ini, set Use_MPA_Extensions to 1.
The new version of dgmpgdec is writing mpa as mp1/mp2/mp3. Anri-chan ends up using wavsource with mp2. Turn on the flag and it'll write the correct mpa extension.