BlueStacks Will Not Terminate

Hi, I was using BlueStacks on macOS Mojave 10.14.5 earlier today and it stopped responding so I was force quitted it. When trying to reopen it nothing happened, so I attempted to reinstall it from the .zip (which I keep). This failed, as the application is apparently still open. How can I close/terminate it? I have tried the following already:

• Delete application
• Move application to trash
• Force quit via activity monitor (it no longer appears here or in the normal force quit window)
• Using terminal kill PID (kill 2346)
• Using terminal to delete it (rm -rf, etc)
• Deleting the package contents of the application then renaming it

None of these have worked and I have a lot of things open that I'm currently working on, as well as a lot of files syncing to OneDrive (my internet is slow) and I'd rather not restart. How should I close the application and/or terminate it's processes?