Below are four quick steps to run a clean uninstall/reinstall of UNIFI.

First, download the UNIFI installer.

Second, you'll want a company admin to run a command prompt:

Next, change the directory to wherever the UNIFI installer exists (usually in Temp or Downloads).

Then run the second command under the 'Clean Uninstall' section of the technical document:

UNIFI.msi /passive CLEANUNINSTALL=TRUE

This will scrub all instances of UNIFI from the machine down to the registry level and allow for a fresh install to the latest version found here.