All hosts are visible in "My Inventory" but not all hosts are visible in Replication Wizard when doing replication.
The config file may not be updated after an upgrade from previous version of vRanger.
Modify C:\Program Files (x86)\Quest Software\vRanger\Client\Vizioncore.vRanger.Client.Shell.exe config file
<!-- Value in seconds sets the time out for the wait form -->
<add key="WaitFormTimeout" value="120" />