Want to Upgrade from GO to Pro, but has paid for the GO

I hope my thread falls under the right category.
So I have a subscription on my iPad for Sketchup go. And i paid for it trough apple app store. I am planning to buy the Pro Plan so I can use it on my PC or laptop as well. But the Pro Plan includes the GO plan (which I am subscribing on app store already). Is there any particular price I can get (not full Pro account price) so I don’t pay “double” for the Go Plan? Hope you understand what I mean.

When you sign in to your Trimble account with the same email address and password you used when you purchased GO, the site will prorate your purchase price at checkout so you won’t pay double. How long ago did you purchase the GO subscription?