Hi there,
I have the same 2 errors despite the fact that my installation is the standard Microsoft store installation.
The UserCfg.opt file mentioned is in: AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache,
the database builder defaults to: AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages.
I have tried both paths and I get errors with both.
Error : The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters. at System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths) at System.IO.Path.InternalGetDirectoryName(String path) at System.IO.FileSystemEnumerableIterator`1..ctor(String path, String originalUserPath, String searchPattern........
and
Error : Could not find file 'C:\Users\simon\Documents\AivlaSoft\EFB2\Server\DbBuilder\Base\Mfs\comservices.bin'. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost) at f.f.z.p.f(SimulatorTypes A_0, NavdataTypes A_1, String A_2)