Test button is cmd.exe with parameters /c echo %p%s2 & pause.
1. Focus file in its dir and click the button:
2. Go one level up, press Ctrl+B, focus file and click the button:D:\!!!DOW~1\!!!Ready\!!!Games\Valve\HALF-L~1\config.txt
3. Go another level up, press Ctrl+B, focus file and click the button:D:\!!!DOW~1\!!!Ready\!!!Games\Valve\Half-Life\Half-Life\config.txt
4. Etc...D:\!!!DOW~1\!!!Ready\!!!Games\Valve\Half-Life\Valve\Half-Life\config.txt