Macbook Pro 2011, 10.9.5, 2.7 GHz Core i7, 8 GB DDR3.
Installed 2.0.6. from the .zip.
Was happening recently on 2.0.5 as well.
I’ll be editing a song to make a ringtone, and everything works fine for awhile. Then all of a sudden, I am unable to cut the track. Doesn’t matter if I left the program and came back or had the program open the entire time. I ended up having to close out of the program entirely and reopen and re-add the track and do it all again.
I’ve disabled the ‘nap-app’. Generate, effect, analyze is grayed out as well. Copy doesn’t work either.