Tacx Desktop App & ANT+ devices

I'm trying to use ANT+ protocol with a proper antenna to connect my trainer, to reduce o solve the disconnection problems.

Is it correct that I have to press "Stop Searching" for ANT+ devices if I want Tacx Desktop App (TDA) is able to connect to the trainer?

If I do not press "Stop Searching" it starts to try connecting to the trainer without success.