I bought a sketchup shop license and now want to upgrade. Can I get credit for my shop license when I buy a Sketchup Pro license ? I seem to remember seeing that some where but cant find it now when I click on buy Sketch up Pro
Go to the SketchUp website and sign in. You should be able to take care of that then.
This article gives you the steps to upgrade from Shop to Pro:
It looks like you worked out how to do it, and should see a discounted amount that takes into account your use of Shop since March. Note that what you have done is convert your subscription from Shop to Pro, and only paid the difference for the remaining subscription time. Which makes it less money to pay, but also means that your renewal date with be in March next year, and not the end of August.