Hey guys,
my experience so far, after only little time spent with Biab 2025:
I am also having issues with Steinberg VST3s. Halion7, HalionSonic and PadShop are crashing Biab immediately when trying to load them (after scanning without problems). The only Steinberg VSTi that works yet -as far as I have tried- is Retrologue.
A bunch of other VST3s are working: AmpleSound, Native Instruments (as far as I have tried them yet), MeldaProduction, ...
There seem to be certain plugins that can crash Biab upon scanning, though I have not yet found out which ones, but this leads to a crash when trying to scan the complete VST3 directory. At the moment it seems to be a good idea to scan single plugins or subfolders one by one, adding only the plugins that are really going to be used.