I just tried it on a win7 64bit virtual machine and got the same problem. THe issue appears to be a permissions error writing to the install directory. You will need to grant write permissions to that folder and its sub-folders for the logged in user (or for all/any user or group who wants to use it).
I will have to do some investigation around win 7 security settings etc, so people wont have to do the manual permissions step. But for now the setting write permission on the install dir should fix your problem.
Alternatively, you can right click the shortcut and select "run as administrator" that should also work.
OR, yet another way is to install to a directory which is not "Program Files (X86)" or "Program Files" - try altering the install directory to "C:\AKUAG\Aces High Pilot Stats\"