My next suggestion would be checking the Temp Audio Directory in Preferences.
Many overlook this, but it is where all these Edits get stored. If it is the same as the OS (C: drive), or worse yet an external drive, I can see this causing streaming/performance issues and errors.

Just trying to help.
Maybe a remote session with PGMusic staff is in order; they could see/test the issue in real time.


Make your sound your own!
.. I do not work here, but the benefits are still awesome