I just received my regular email for AmpliTube 5's update to V5.7.0 which says it includes a fix for "a CPU load issue that occurred at startup."
I just installed the update and, not believing until seeing, I ran a few load tests under a few configurations. Result. . . IT WORKS! My load times have gone from 5-10 minutes down to under 1 minute. WooHooo!
Thank you IK for that one!