Just an update:
After four days of silence I finally got this answer from IB:
"Thank you for contacting Interactive Brokers Client services' team.
This is a technical issue that we are working on.
We are sorry for any inconvenience this issue caused.
Should you require any further information please do not hesitate to contact us again."
Then, they just closed the Inquiry!
Just tested TWS now and still no FX Conversion in real account nor Futures Orders in Paper Account.
This is sad, to say the least...