Solved for me. You have to delete (or rename if you are chicken like me) this file: SeLicenser.sel
It is located in "C:\ProgramData\Syncrosoft" on a windows machine
( the “ProgramData” - folder is a hidden system folder, make sure that you see it: Organize => Folder and Search Options => “View” Tab)
or here on a mac: /Library/Application Support/Syncrosoft Soft-eLicenser/