Cant launch Dorico

I dont know what happened, I acitvated a license but cant use it
I do have a Trial version but how can I remove that license?

It looks like you’re running v1.2.0 of the Steinberg Activation Manager - you need to upgrade to v1.2.10 which I think will fix this problem. You can upgrade either by running the Steinberg Download Assistant, which will automatically upgrade SAM, or by manually downloading the installer from Steinberg Activation Manager | Steinberg

It worked ! but the Trial license Still in my account

That’s expected - trial licences don’t get deleted when they expire.

oh no, is there any option for offline activation file? I dont know if I always will have internet connection

Once you’ve activated, you don’t need an internet connection. There’s no “phone home” thing with this new licensing management.