Error 80070643

I am currently trying to install Storyline 2 Update 6, but I doens't let me finish. When the installation seems close to complete, the bar moves a bit to the left, then continues loading a bit and right after that I get the Error 80070643 (The Storyline installation folder contents appear to have been moved, renamed, or deleted).  I was running with Update 5 perfectly before trying to install this update, but now I can't even go back to that.

I tried uninstalling and installing it again but it would't let me uninstall. Running as administrator wouldn't help either, nor did any of the solutions from the other similar threads because many of them listed that you had to uninstall SL2 and do it over again, but i am unable to do that.

I understand that it may not find the previous installation files, i have them, but i don't know if they are in the same folder/place in which they were when I first installed those updates.

I have Windows 7 Home Premium 64-bit.

I have submited a support case already, but if anyone has any solution, I'm keeping this thread open.

I have attached several screenshots of the error messages I get displayed. 'SL2_uninstall' is the message i get when i try to uninstall. 'SL2_install_failed' is the error i mentioned earlier. 'SL2_try_to_open_file' is a message i get when i try to open a story2 project, and when i click ok in both windows i get the 'SL2_unrecoverable_error' (it's in spanish, but it states the route of the project and then it says 'unrecoverable error during installation'.