Windows 10: Will not update to 3.1.1. Error code every time

I have 3.0.5 installed. Every time I start up Audacity it suggest I update to 3.1.1. The moment I try to update after I have downloaded the latest file I receive the following error code:

“Setup was unable to create the directory C:\Users\SM\AppData\Local\Temp\is-AD8BS.tmp”

Can anyone tell me how to resolve this issue without uninstalling Audacity and reinstalling the newer software?

Have you tried rebooting?