Win7 ultimate installed, downgrade to Pro?

I think I'd probably also trying to strip out the Digital ID's if you have nothing else to lose and have everything backed up to reinstall anyway. But I'd copy them to a notepad and save it along with the Product ID you already took out.

Something is telling it that you have Ultimate besides the Edition ID labels.

If the PC becomes unbootable you can enter System Recovery Options to System Restore or just move to the reinstall.

You can use this as the opportunity to get a perfect Clean Reinstall Windows 7

This is totally at your own risk because I've not done this before and don't even know if it will boot afterwards.
 
How do I do that?
 

My Computer My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Cyberpower
OS
Windows 7 Home Premium 64bit
CPU
AMD Phenom II X4 850 Processor
Motherboard
ASUS M5A78L-M/USB3
Memory
6GB DDR3
Graphics Card(s)
AMD Radeon HD 6670 2GB
Antivirus
Avast Antivirus
Browser
Google Chrome
There are two regedit entries above the Edition ID that have Digital ID's
 
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