I did try many web builder sites and that includes JIMBO.
The best one of them is YOLA but the single file size limit for upload is also 5Mb. Storage is very large though.
Could you not upload RFODESIGNER to the forums
If you go back into the forum and see how much of your uploads to forum still exists then you will be very disappointed. Most of it if not all older ones are gone!
Google is in process of moving the Sites to a new Sites and I think they changed Terms that an EXE inside a ZIP is now no more allowed.
But they are silent and dont respond to my questions/pleas. Since I want a permanent place for RFODESIGNER that is free forever I am considering creating a new site on Google and upload all files to Google Drive. Then I only place a link in the website to the shared file in Google Drive.
I have already tested it and it seems ok.