Hi,
I am about to take the plunge and pick up X3. One question - can I install X3 alongside X1d & continue using X1 if I have any problems? I have been able to do this with older versions, but I want to make sure that this is still possible. I kept 8.5 running for a while until I was used to the new X1 interface, and had no problems there. Thanks for any input.
Regards,
Terry

YES

Yes.
 
All SONAR versions install/run independently of each other. They will import the preferences from the previous install on the first run of the newly installed program.

Great news! Thanks for the responses. Now to snag my upgrade with freebie delay :)

It's a good idea to keep previous versions of Sonar on your PC. In case you have a problem opening an old project, it's handy to have an earlier version ready to go for testing purposes.

At one time I had Sonar 5 - 8.5.3 on my box. Now I have X1 32/64, X2 64, X3 64 on my box.