WebGrabPlus_V4.2 program does not start

Dear friend,
I uninstalled the old Webgrab 2.1,
I installed WebGrabPlus_V4.2_,
to the previously used config file, I am behind the line
"f"
completed the line
""
instead of ???? should I add the password that I use when logging in or the passcode?
I tried both, but neither of them will start the program.
I used this config before with version 2.1 with the new one it doesn't work anymore.
It will not create any log.txt either
Please, how should I proceed?

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UPDATED
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I uninstalled version 4.2.4, it wouldn't run with .NET5
I installed version 3.2,
now it's about to start,
but will report that the license has expired

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SOLVED
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had an incorrectly set .config
V_3.2 works correctly
but
I could not run V_4.2
Well thank you