License remove after clone

i allready have some raspi's running VH, now it came that i had to create a clone, changed ip and hostname and connected to the device. Of course, and rightfully, it claims about an invalid license. Before i now buy the next license i wanted to test the device (1 connection license would be sufficent for test), but HOW to remove the INVALID License?

#2

Stop the server process, edit the config.ini file and remove the License line, save, then start the server