in the connect/utilities folder, there is a .bat script called mfcResetPassword.bat.

right mouse click, run as (O.S.) administrator.

the Administrator Connect password changes to 'changeme'

I have run this script, but account Administrator was still locked, so I am forced to reinstall connect

After reinstallation Administration account is still locked !!!!!

The script has been confirmed to work correctly, repeatedly.

Please refer to https://admhelp.microfocus.com/connect/en/latest/Online/Content/Topics/batch-utilities.htm on how to utilize the utility scripts, including mfcResetPassword.

The password is located in the MFC Connect database.
If you keep the DB from a previous install, a re-installation will not change anything.
And a reinstall is not the correct method to resolve a locked password in an existing DB, anyway.
The correct way is to use the batch script or to contact support.

i recommend opening a support case and gettig help resolving this

In the mentioned bat file was a issue in finding a path

"%JRE_PATH%\java.exe" -jar "%UTILITIES_PATH%\mfcMaintenance.jar" -resetuser "%CONNECT_USER%" -d "%DATA_PATH%"

I replaced path directly

"D:\Program Files\Micro Focus\Connect\jre\bin\java.exe" -jar "D:\Program Files\Micro Focus\Connect\Utilities\mfcMaintenance.jar" -resetuser "Administrator"  -d "D:\Program Files\Micro Focus\Connect\AppData\data"

So, now I have reset the password ;) ;) ;)