Could you try this version:
https://getmusicbee.com/patches/MusicBee35_Patched.zip
make sure you also replace "musicbee.exe.config"
if it doesnt work, you will probably need to stay on older MB versions as .NET 4.6.1 is soon to be no longer supported so I need to update to the latest .NET version
I did and it works, but in a sort of a "weird" way

.
First of all thank you very much for this update.
What was "weird" is this.
I copied both files to update and started downloading pod-casts. The first 10 worked and then the same error happened again. Restarting MB did not change anything so I replaced the files again with the same files from the zip-file and now I am at 30+ and downloading still works.
No idea why, but it does.
You are right, at some point I need to upgrade to W10 or stay with an older version of MB.
But for now you saved the day

, thanks you!.