for some reason that download just opens in a new tab with same page but no file to be downloaded...

Anyway looking at the script you should have
/home/user/MyDocs/faster/.config &&
/home/user/MyDocs/faster/faster

yours is currently:
/home/user/MyDocs/faster/

Looks like F2thak changed the script in v5 hence I didn't know about the new directory structure...


P.S. why not do the copying yourself via terminal or manually instead of relying on the script? You can always use theme settings/theme manager to select faster as your theme of choice...