Chef Garry - Yes you can clear out the downloaded files. If you have applied the files they then are already installed and still available via the individual programs. To delete wincustomize cookies try this link: https://www.wincustomize.com/killcookies.asp
Peff - re: twin entries. Yea, thats a known problem. Maybe one of these days I will try to tackle that problem. Low priority right now.
Motion & Fuzzy - I just made a change in the script, it might fix the problem. But even though you get that error does your message get posted?
jebland - you can either try https://www.wincustomize.com/killcookies.asp or do a file search on your system for *wincustomize*.txt and kill all those files.