How to Use ImpEx 
From your Admin Control Panel (admincp/ by default), select Import > Import and select the system you wish to import, from the list.

Please note that the ImpEx system is written for version 3.5.0 and higher.

Now that you have installed ImpEx and selected the system to import from you are ready to do the actual import
Warning:
This is your last chance to back up your target database
Copyright © 2022 MH Sub I, LLC dba vBulletin. All rights reserved. vBulletin® is a registered trademark of MH Sub I, LLC dba vBulletin.