AFAIK it reads the aircraft.cfg. So you can change the values there, but be careful not to exceed the MTOW.
I did this a while ago to simulate a (smaller) aircraft with additional fuel tanks for ferry flights.
Is there a safe method to adapt the Fuel Planner to reflect specific weights etc for aircraft in the sim?
The generic weights in the planner are fine but don't reflect the exact variations for easyJet and BA for example with different seat configurations etc.
Thanks
Indeed, please submit the full description of your issue, your software/hardware settings and the original order number to the official support ticket system here :
https://helpdesk.aerosoft.com/hc/en-gb