Hi Artur
If this is a 76 Spyder, then you are in for a few fun filled hours with a sharp knife (Stanley or other).
If this is the original fitting of the screen then it was stuck in using a a system which placed the sticky stuff as a solid 'rope' around where screen was to fit. The rope had a conductor down its middle which had a current passed through it to warm and soften it, so that the screen and surround could be 'glued' in place.
So you need to first, using the blade of the knife, use as thin as you can get, get between the trim and the glas and cut the 'glue' to release the trim, be careful not to distort it as pretty fragile, patience is required for all of this!
Then when the trim is removed, you can see where you next have to cut, but be wary of the wire, which does cause extra pain. You will probably have to use the knife from both outside and inside the car to get the 'glue' cut away. Eventually you will find parts of the screen will be able to lift slightly, just keep working at it until all of it is clear, then you need to lift out and clean up what is left on the trim and a screen.
Best of luck, I have done this three times, not enjoyable and does take a fair amount of time.
Peter