How to reproduce:
1. Open Unity Hub
2. Go to the Installs tab, select a version, start installing it
3. While it is still installing, change the installation folder to something else
4. After the installation, attempt to open a project with the installed version. Observe the error

Expected result: The version is installed in the old destination and Unity searches for the version in the old destination.
Actual result: The version is installed in the old destination, however, Unity searches for the version in the new destination.

Notes: Attempting to locate your version with the "Locate a version" button in the Installs tab fails to locate your editor, as Unity Hub believes there's another copy of the same version installed in the new folder. Trying to uninstall the version is impossible, as the "Uninstall" option is not present. There is an easy workaround, which involves simply setting your destination folder back to the old folder that the version was installed in. Going back to the new folder again after doing so no longer reproduces the bug.