I cannot buy the upgrade VMW fusion 7 to Fusion 10.
The serial number is not displayed in step 2 of the buying process.
I can find it in myVMWare folder of the previously registered Fusion 7 purchase.
Adding that number manually in step 2 still does not work, the continue button remains grey and cannot be clicked.
It is the last day of my evaluation period, please help me!
And today it worked!
Apparently you have to select the current version that you have.
If you do that, you are allowed to continue.
Seems stupid of me, but the instructions were also vague at this point.
Anyway, upgrade was smooth, I can work again.