Once logged in with an admin account, you will see the URL at the top as:
<protocol>://<serverName>/Archiver/Dashboard.aspx or the last page visited
Change /Archiver/Dashboard.aspx to /Archiver/PostInstallWizard.aspx
Notes:
a full window will be displayed instead of a pop-up
instead of running the post install again, if one of the 3 tasks for the post installation was not done (Licensing, Archiver Store Settings and Archiving Method), these tasks will appear as red in the left panel on the Configuration tab
by default, the wizard will not trigger if all 3 settings were previously entered