I would still like to try to reproduce the steps so I can share them with you, but I am afraid to mess up my license, so I will tell them again, just so you can possibly test and see if it can be avoided.
Basically, you have an active licensed installation on Server A
On server B, you install FOP2, then remove the directories /usr/local/fop2 and /var/www/html/fop2 and copy those directories from Server A.
The installation on Server B now has a fop2.lic file from Server A but it won't work since everything is different, so I used a DIFFERENT license then the one on Server A to activate Server B. This worked fine, but I couldn't revoke the License on Server B.
Perhaps I did something wrong, its always possible!, but from now on, I will be installing FOP2 and just activate the license and then import the Database, possibly the files from /var/www/html/ but not the /usr/local/fop2 where the fop2.lic is stored.
Regardless, I appreciate your prompt response both in the forum and @ support.asterinic.biz where my license was manually revoked.