Where does Omni Login store its Automatic Login settings?
The settings for Automatic Login are stored in the DEX.INI file in the WDC_Auto_Login setting.

Why do the Omni Login settings only effect the current workstation?
Because each workstation will have its own DEX.INI file, the settings stored in the DEX.INI file will be for the current workstation only.

Is there a security risk having a password stored in the DEX.INI file?
Yes and No.  The password is encrypted so that it cannot be obtained by looking at the DEX.INI file.  However, having the workstation log in without asking for a password is a security risk which you are accepting by using the Automatic Login (with password) functionality of Omni Login.

I am having a problem with Automatic Login, how can I disable it?
To disable Omni Login when you are unable to login, delete or comment out (with a semicolon) the WDC_Auto_Login setting in the DEX.INI file.

After Installing Omni Tools, why does the system remember the last company I used?
Great Plains already remembers the user, and Omni Login will remember the company.  This makes logging in much easier.

Is there a security risk by having the User ID come up from the last login?
Yes there is, especially on a Citrix system as half of the User ID/Password has been supplied.  Omni Login can be asked to forget the last user and last company used to avoid this weakness.

Can't I just make the DEX.INI Read Only to stop the last user being stored?
You could, but that would cause any other software which attempts to write to the DEX.INI file to fail.  All Winthrop Products store information in the DEX.INI file.