The Fs2 is good but is neccessary one powerfull computer is my problem.

Hi, I have Aerofly FS, version 1.2.0.9 There is a sign that sells in the lower right, which says that to remove it use the command Shift and Tab and it must be removed and it does not. Consult Aerofly technical support and respond to anything and 15 days without solution.
Can you help me.
regards
Alfred