Hello Juergen,
You were right, thank you.
I could go ahead where i was stuck following the instructions you indicated, but I am still having issues.
I was able to access my instance from putty (using ssh) and from studio, but now, since i had deleted the instances before i saw your reply, i started requesting a new license, but got errors in some step, and then i also try creating a volume and an instance from private AMI, but still unable to access using ssh. So quite disappointing.
Can i request AWS to reset my profile so i start from scratch? I have imported the existing key pair which was working, then i created a new one., so i do know where the problem is.
Thanks a lot!
regards