Unable to update software and other issues

[skysurfer]

Hello
PMDG 737 for MS2020. The CDU is doing some weird things. Key commands do not line up with what they supped to do. When I click FUEL in FS Actions it opens doors page, when I LCK DEP/ARR it opens COLORs page. Everything is out of order.
I cannot update software as well. The bridge window shows NO DFU DEVICE DETECTED. I followed the link how to enter DFU mode but those steps are useless.
Also, when I click CLR button i see some random numbers at the bottom of the screen. Unable to clear anything in the scratch pad.
Need help please.

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