TMG can’t handle a path that doesn’t start with a drive letter. Depending on your Parallels sharing settings in Windows File Explorer and or Computer you should find a Z Drive and perhaps other drives, (the drive letter may vary, it has been my experience that Parallels starts mapping at Z and goes forward.)
In step 2 of the Restore Wizard use the […] ellipsis button and navigate to the mapped drive, for me this is usually way down near the bottom of the list. Look for Home on ‘psf’ (Z:) then drill down to the TMG Project folder (again the drive letter may vary depending on your share settings in Parallels)
In the Restore project to this folder: you should wind up with something like: Z:\Documents\The Master Genealogist V9\Projects\
In my article see the section Backup File location. Also read the section: A caution about adding exhibits via drag and drop:
Finally if you experience any problems with your TMG project files located on the Mac side relocate them to the Windows side – see the section: Fixing a broken installation.