Hitfilm express - update stopped with Access Denied to folder FXome
I had not opened Hitfilm Express 4 since upgrading to Windows 10, I don't believe. When I opened it today, there was an update message which I accepted. It stopped when it could not access the C:\Program Files\FXhome, stating that I needed Admin privileges, which I have. Since the install could not continue, it exited. Tried again, no success. Tried to look at the folder with Windows Explorer and clicking on the folder gives me a message that "Location is not available, C:\Program Files\FXhome is not accessible. Access is denied." I searched the internet for Access denied and tried some solutions, but nothing worked.
I tried running Hitfilm Express 4 again but now get a message that the item referred to cannot be accessed. I also noticed that Hitfilm no longer shows up as an installed program, so I can't even uninstall it.
Any suggestions as to what to do?