KAP 5.1.1 Slow Load Times

I’ve mentioned this before, but 5.1.1 loads very slowly. 4.7.7 loads in ~1:15 while 5.1.1 loads in 5:45. I get a warning that my antivirus (Malwarebytes) may be slowng the load. However, I have v. 5.1.1 whitelisted. Both versions have approximately the same number of nodes and extensions. 4.7.7 has many more workflows in its workspace. 4.7.7 is installed on an internal SSD drive. 5.1.1 is installed in an external SCSI drive, but I wouldn’t think that would make so much difference. Any ideas?