You can use the Markvision Enterprise Password Utility to create another Admin user.
Browse to the folder where Markvision Enterprise is installed.
For example,
Launch the mvepwdutility-windows.exe file in the Lexmark\Markvision Enterprise\ directory.
Select a language, and then click OK > Next.
Select Add User Account > Next.
Enter the user credentials.
Click Next.
Access MVE, and then delete the previous Admin user.