Improve plugin updation process

[Strykar]

Now that the new "update available" feature is present, the plugin should be easy to update. Currently, it will not let you update till you manually uninstall the previous version.

Can we have the installer automatically uninstall the older version after confirmation instead of the manual uninstall, then reinstall method in use now? Auto-updation (user selectable) of this fast moving plugin may not be a bad thing either.