When I try to delete object with PrpShop, the application often crashes with a segfault. It doesn't happen always though - I was editing the DescentMystV_District_dsntFootRgns.prp file from Race's Myst V additions, and while deleting the "Audio Interface" or the "Win32 Streaming Sound" worked, removing the "Win Audible" or the "Sound Buffer" crashed. Even the object which was removed obviously still had some traces though, as PrpShop would (after saving and opening the file again) still show "Audio Interface", but without any object in it.
EDIT: I removed the objects using PrpPack, and it seems to work (at least the game doesn't crash ). However, PrpShop still shows an "Audio Interface" category without any object in it (the other categories of which the only object got removed do no longer appear). Any idea what that could be caused by? I can upload the prp file somewhere if that helps.