FOR GODS SAKE SHUTUP.
now, files CAN be recovered once they are deleted from the recycle bin, from what my father told me they are overwritten with 00000000's(so they dont take up space) and then placed as hidden.
A recovery tool reverises the effect of the 0000's and places it as "un-hidden"
The more time you waste trying to look at this site, the more of a chance you want get the file.
Google "file recovery program download" then find one you CAN understand and use it before your file is overwritten.
And you CAN recover any file type from what i know, my father has recovered several of my files such as music,zips and softwares, but if you cant recover wc3 map files, then sorry to say you are stuffed.
and from what i know you can only reverse your system back IF you save it before you do something stupid or bad.