This extension has been unpublished for the following reason:
UR3-Vulnerable Extension
Warning! This extension is listed on the Vulnerable Extensions List.
Follow the link below for more information. If you currently use this extension, your site is potentially at risk!
docs.joomla.org/Vulnerable_Extensions_List#osproperty
You should also immediately get in contact with the developer of this extension and inquire about fixes to this security risk.
Yes, you can backup your change first, and then, install the update. After installing, you can restore the backup.
You don't need to reinstall all over.
Thanks
Dam
