[Guide] Ripping models from Sketchfab

i can't open the blend 249 file with the blender provided in nalinzaws guide. gives me an error, says just "can't open..."
if i try to open the script with the newest blender it opens up, but i can't run it, gives me again errors, blender Telles me i missed maybe some "(" and ")" signs at the lines with "print"
No plan about scripts so im stuck here...
the program vom rig models doesn't let me try it out, and i just want one model, so i won't pay 50 for a lifetime license.