http error 400

v2.46a worked last it doesn't! When I try to connect to the tag source or I get an error message-

"Error connecting to server: (or de)"
"Bad request (400)"

I can connect to discogs and MusicBrainz. I do not use these so I am not sure if I am getting correct information from them, but there is no error message as with Amazon.

I have uninstalled and reinstalled Mp3tag twice with no improvement.

Can anyone tell me what is happening? Is it Amazon or my PC? Help!