I’m experiencing issues with Blackhole in FL Studio too.
I’m running FL Studio 20 64bit (latest update) on an i7/16GB RAM Windows 10 Pro 64bit Dell Precision M4800.
Installing Blackhole and using it in FL Studio worked fine in the beginning.
While working on a project where I had Blackhole on a mixer channel, I wanted to replace it with another plugin.
This was impossible, because with every attempt to replace or delete it Blackhole from that mixer channel… it crashes my DAW.
Thank you in advance.