Fix: stop annoying UAC prompts, recommends to use the task scheduler and set highest priviledge for the task. I used it to run a GFPM task. Then created a shortcut to:
C:\Windows\System32\schtasks.exe /RUN /TN GFPM\GFPMI called this Shortcut "Run GFPM without UAC warning". It seems to work, there were no UAC warnings anymore!
A next step would be to run GFPM under wine in linux. That would make it easier to run more than one simulation. From wine it's not going to be possible to use Excel, so I might have to start the batchfiles after the call to world.xls.