Hi
User manual is at
AvSoft | User Manual 1.5.3 was reviewed so soon that the next manual update will be there in a day or so.
Holding and taxi fuel is based on average fuel burn in the active plan - Taxi fuel will be changed soon to an amount - and it will use the holding fuel burn rate.
To delete a performance profile - in the flight plan, tap on the aircraft symbol, then the aircraft. Now swipe row on the performance profile to delete that profile.
Thanks,
Bevan..