Edit Membership dialog won't close after removing large number of expired updates

Hi,

I was following the directions from this link and on the first step

http://blogs.technet.com/b/configmgrteam/archive/2012/04/12/software-update-content-cleanup-in-system-center-2012-configuration-manager.aspx

to remove expired updates and after unchecking all the updates I wanted to remove I clicked the OK button.  That was about 20 hours ago and the dialog box is still open with an hour glass.  I was attempting to remove close to two years worth of old/expired updates so maybe this should take a long time?

If I look in task manager on the server I can see that the smsexec.exe and Microsoft.ConfigurationManagment.exe*32 processes appear to cranking away and have been since I clicked the OK button.  If I look at the SQL Server that is hosting the SCCM database the SQLServer.exe process is also busy cranking away.  I'm a little hesitant to click the Cancel or X button on the Edit Membership dialog as I'm not sure what that would do at this point.

Is there a log or something I can check to see if the process of updating the update group memberships is done?

Thanks in advance,

Nick