A customer contacted me and told me that after updating his Waves plugins, Forte could no longer find them when loading a rack file. I investigated and found the following issue:
Forte uses the plugin DLL name as part of a unique “key” in the plugin database (CLSID). A plugin name change can result in a different key name (see plugins.xml and plugins64.xml in your data directory). This was done for a specific reason years ago, probably because a VST plugin vendor has used the same VST ID for multiple plugins.
I will be looking for a real fix soon, but for now, the solution is to copy the updated VST DLL (e.g. WaveShell-VST 9.91_x64.dll) to the old name (WaveShell-VST 9.6_x64.dll). This is known to work.