I had the same scenario a month ago. I purchased a used mint condition head with other 500 profiles. Just because some are paid for doesn't make them better, there a MANY great free ones. I created a local library and moved all 500 to that folder and then did a Global reset and a Factory reset. I then started to pick and choose what I wanted back in the profiler from the 500, Kemper Rigs and from the Rig Exchange were I found many great ones. I am at about 80 Rigs loaded.
BTW...here are the instructions I received from Kemper email support on how to Factory Reset:
It depends what version of the operating system is installed. The current 7.5.4 version will automatically restore the factory settings if you apply a init&factory content reset.
In order to reset the PROFILER to the factory default state please perform the following steps:
1. First, consider creating a backup as this process will delete all user data and reset all global settings.
2. Upgrade to the current PROFILER operating system release software. If your Profiler is currently running a version older than 7.3.2 you need to update to that version first. You can find it here
https://www.kemper-amps.com/do…8/Older-Software-Versions
3. Switch the PROFILER Head or Rack model off and press and hold soft button 1 (left above the display) while powering it on into tuner mode. If you are a STAGE user press the soft button 1 and the SYSTEM button and power the unit on.
4. Keep holding the soft button until "System Maintenance " appears on the display.
5. In maintenance mode press "Recovery", "Init&Factory Content", "Yes", "Ok".
6. Then press the Reboot soft button and reboot or simply restart the PROFILER with the chicken-head knob.