Preset Merge crashing R4

Hello! I am upgrading from V2 to V3 using the File->Merge function. Whenever I select the box next to Presets, V3 crashes instantly. All the other Merges work fine, but Presets crashes every time no matter how many other boxes are checked or unchecked. Am I missing something? Do I need to install a previous version first and then upgrade to R4? Running on Monterrey.

I solved it! Corrupt effects that were created long enough ago that the fixtures referenced weren’t in the system anymore.