I'm a bit confused. You deleted the Blender 2.83 folder? So..... how do you use Blender if you deleted the Blender folder? I must be missing something, or are you essentially using the good 'ol "I can't fail if I don't try" philosophy?
Seriously though, it shouldn't be difficult to get the ball rolling with Blender. Install the latest version (2.83) and make sure that your shortcuts on the Desktop etc. are pointing to the latest version.
To be safe, go to %APPDATA%/Blender Foundation/Blender/2.83/config and delete p3d_locations.xml if it exists. Then go to %APPDATA%/Blender Foundation/Blender/2.83/scripts/addons and delete the Blender2P3DFSX folder. This should give you a fresh start.
Once you got all that verified, startup Blender, go to your settings->addons and install the Blender2P3DFSX toolset using the zip file.