I use TBS 8.1 and for about 6-7 months everything was running smoothly but now it won’t open anymore. Strangely, it still shows up in the task manager. Any help would be greatly appreciated.
I can’t even get that far 
I was able to open it once but after that I couldn’t anymore.
Sounds like your workspace might have gotten saved in “minimized” mode.
From splashscreen (if you’re able to get that far) menu-Window-Workspaces-Restore Workspace.