Hi. Without any details of your system, the location of your files before you lost them, how you deleted them and exactly what version of which software you downloaded them with, I can only make an educated guess. I assume you have checked your trash/recycle bin.
Either the files are somewhere in your applications folder, or you have inadvertently moved them somewhere else. Use your computer's search function to look for the files by type, or by the name of a missing file.
You may need to use a file recovery programme. Restoration (find with Google) is recommended which will find deleted files provided they are still on your system.
It is also possible your files have been replaced with nasty little zip files, in which case do not touch them but post back and we will give you further advice.
I hope this helps