Um...you made a big bo bo!
Ok..try this.
Start the machine in Safe Mode if you can.
Then see if the files appear in the Recycle Bin.
If not, access Avast Virus Chest and see if they are in there. If they are, you can restore them and start over.
If you cannot locate the files in the areas above, then you may try to download a file recovery program from wanteddbest.com or webattack.com
These usually can recover "deleted files" on the hard drive (which are never really deleted, just blocked from view and access.....unless they are "shredded" using a file shredder program).
Confusing a bit, but that is all I can suggest at this time.
Good luck
