Hello Albani
This is a known bug in Version ProntoTimer94-1.1.As updates always involve a lot of work I would like to suggest you that you wait for version 2.0, which will be available to you soon (free of charge).

The latest version 2.0 ist ready and the testers have given me a lot of good input to make the time more functional and usable. I am updating the installation guide and then I will post the new version: I ask you for your patience.
Best regards