With the Beta Version 3.0.89, there is no delete performances menu option under My Profiler rather there is an "Initialize Performance".
I have about 75 empty New Performance till the last 125th that I want to remove. I don't recall if it was always like that brcause now I use the 3 Beta.
Trying to import a performance from the local library to the profiler increased the number of performances to 126 which caused a freeze of the kemper. Maybe this is a bug,