Okay so that didn't work, so lets go over some other options.
1. You might be able to recover your files from the Steam Cloud if you had that turned on. For tthe random number part of the url it's going to be different for every person, but navigate to: C:\Program Files (x86)\Steam\userdata\*RANDOM NUMBER*\105600\remote. You should see a world folder and a player folder see if this folder contains your files. If that doesn't have your files move to step 2.
2. You might be able to right click the files, select properties, and then click the "Previous Versions" tab and select an older version of the file to see if it's current enough. If it's too old, or it doesn't have a previous version move to step 3.
3. In the event we are unable to retrieve an uncorrupted version of the file then we can use an inventory editor on a new character file and add all the items, equipment, and stats your character had. A web based version is:
http://yal.cc/r/terrasavr/ you should be able to create a new character the same as your other one using this program. If you need additional instructions on how to use it let me know. As for your world, I am unaware of workarounds to restore your world, since I couldn't find a world editor updated for 1.3.5.X. There's in game items you can give your character to help restore your base faster.
I'm really sorry that this happened to you. So now let's go over possible ways this could have happened to prevent further corruptions.
1. Disable Steam Cloud Synchronization for Terraria. It causes more problems than it fixes.
2. Disable Cloud and Folder Syncing software from accessing Terraria's files.
3. Create a Manual Backup after each play session (To do this create a new folder called backups, create subfolders with the days date, and start copying and pasting your character and world files in those sub folders).
4. Scan your hard drive for possible hardware failures. To do this right click your C: drive and any other drives, and select properties, switch to the tools tab and under error-checking click "check now"
We're pretty limited on what we can do for corrupted files which is a shame. Hopefully one of the steps was helpful to you. If you need me to explain anything better let me know.