So, that's weird.

I removed the file and run Erminig.
I went into Configure->Google parameters and it asked for HTTP, HTTPS proxy, username and password (I do not remember it ever asked for HTTP proxy).
Anyway, entered them (only username and password) and clicked on Refresh All.
It said it couldn't login into Google and to check for username and password.

I went there again and this time it only asked for username and password (different form, I could tell) and they were empty.

Entered them, clicked refresh all again.. and again the same error as usual..

Weird

I can see in the cfg there's now the proxy entry along with Google entry.
And the proxy entry is half configured (login and pass).

Removed the Proxy entry, but didn't affect (as expected) the final result.