To do it yourself, you can
1. Write down the filepath and names of likely EXEcutable files
in the / Program Files Studio 3 folder.
2. Delete this folder.
3. Save a copy of the Register (using the tool of your choice,
e.g. System Restore or REGEDIT Export etc.) This is a
backup in case you botch step 4.
4. Search via REGEDIT for all keys specifying this folder
and file calls by its unique EXE files, and delete everything
related to Studio 3.
5. Then reboot.