Add settings backup feature to Licence Manager window

When a licence expires, Opus can no longer be opened. At most we can see the Licence Manager window. If one has not recently backed up their settings, it would be convenient if this window exposed a way to do so. In my case, I'd like to uninstall and continue using v12 for a while, and the only way to backup my v13 settings is via manually zipping the relevant folder via File Explorer.

Thanks.