I downloaded the updated Express 2017 and attempted to install (without uninstalling the previous version; the installer should do this automatically if it's important IMO). An error was encountered and the installation was "rolled back" but didn't restore the old version so now I can't move forwards or backwards.
The error isn't very informative as seen below. Anyone else get this? Restarting the PC did not help.
Edit: does anyone have a slightly older version they could put in Dropbox or Box or something so I can download and try to install that? Thanks in advance!