If you install by just double-clicking the installer package you'll get a default install using the standard UI. Start by making sure you really have the new version (RTF readme file, standard UI says 3.1 in the title bar).
On a machine that has it installed you can test this first. Exit from the LANegram program, then open a command prompt and type:
[tt]LANegram /simple[/tt]
This should start it in "simple" mode. You won't see much and there won't be a tray icon. So next send a broadcast from the command prompt, such as:
[tt]Send * Hello?[/tt]
At this point there should be a Messenger-like popup on the screen. While this popup has focus (click on it to be sure) type Ctrl-X to close LANegram. Of course your users wouldn't normally do this or even know about it. Just OKing or "closing" using the "red X" simply hides the simple UI until the next alert arrives.
If this checks out, all you really need to do is alter the Startup shortcut to contain the [tt]/simple[/tt] switch. You can add this switch at the end of the shortcut's Target property, outside any quotes there and with a space in between. It should look something like:
[tt]"C:\Program Files\LANegram\LANegram.exe" /simple[/tt]
If you choose to do this manually you may find it easier to delete the existing LANegram shortcut and make a new one. Installer-created shortcuts protect Target from user modification in most Windows versions.
To have Windows Installer create the shortcut this way upon installation you have to supply the extra info by running msiexec explicitly. This can be done from a command prompt, so open one and change the current directory to wherever you put LANegram.msi, then enter:
[tt]msiexec /i LANegram.msi startargs="/simple"[/tt]
To do this on a machine where you already did a default install of LANegram just uninstall it first.
I hope that helps. I'm more used to coroprate networks where the admins live and breathe this sort of thing. I should have realized that home and small office admins don't deal with it very often.