I discovered that when the version  4 of T-Minus is loaded on a system where T-Minus V3.1 existed, you will get an error due to a duplicate module.  The issue related to me renaming the main ascx file for T-Minus from TMinus.ascx to TMinusDisplay.ascx.  Unfortunately, installer leaves the old one behind thus recreating a duplicate. 

To correct this issue, you must delete the unwanted control (ascx):

1) Sign on has Host (or a Superuser account)
2) Open the Module Definitions page from the Host menu
3) Edit the T-Minus module – click on the edit pencil
4) Scroll to the bottom of the page and you will see 3 controls listed.    Click on the edit pencil beside the first listed control (… /TMinus.ascx)
5) Once the form showing the control is displayed – click on Delete link to remove the unwanted control.
6) When the Module Definition form is displayed, confirm there is only two controls present (…/TMinusDisplay.ascx and …/TMinusSettings.ascx)

At this point you can navigate to a page with T-Minus module to confirm it is working. 

I hope to have the a correction implemented directly.

Paul.