How to stop Remote Desktop USERS from from (SEEING) Logmein Hamachi Panel

Dear Forum, 

I have hamachi installed on my Accounting Server.

All my users connect to  the server via (RDP) .

The issue I have when they login they see the HAMACHI SPASH screen and instinctively they click the OFF Button..

Once done ALL - WAN Users can not access the server. 

Is there a way to STOP HAMACHI from loading on RDP Desktop Consoles  ?

I know there should be a network tool to assist me, but can not put my finger on same.. 

ANY, ANY help welcomed..

One Love..

Edward