For anyone having the issue of TSLPatcher just disappearing after they hit select and are just left with a taskbar icon I finally found a solution!!!
HairlessWookiee over on Reddit had the solution and I CANT FUCKING BELIEVE THIS WORKS, BUT IT DOES!!!!
"As to your specific issue, there can be an issue where the TSLPatcher window/s end up positioned partially or fully off the screen. Try the following:
2.Position the mouse cursor over its icon in the taskbar3.
3.Hit Alt+Space Bar
4.Press the M key
5.Press the left (or any) arrow key
6.Now move the mouse. The TSLPatcher window should be attached to the cursor, allowing you to position it anywhere on screen.
7.Left click to release it."
Happy Modding : )