FL is not using the full CPU resources at its disposal...
Contrast the CPU FL is using with that available on the system. The program (fl 64) is not using the resources at its disposal... it's gone redline and it's sputtering ...
I can not load VST version of plugin made by Plugin Alliance.
It is recognized by PluginManager, but it does not appear in the Install list.
Only the VST 3 version appears on the list.
And the display of VST ...