Try this
C:\Users\[YourUserName]\AppData\Roaming\A2A Simulations... (Note that this is a hidden system folder in Windows.)
And right click the file “HelperA2AserviceMSFS.exe” then click “Send to >” and “Desktop (create shortcut). Now just launch this file with the new shortcut before each sim session.
From https://a2asimulations.com/forum/viewforum.php?f=151 FAQ