So, last night I undertook some surgery, and replaced the motherboard and processor in my old gaming rig with a slightly upgraded combo so that I can squeak in under the minimum specs for Star Citizen. After the bootup, windows started telling me that my copy was no longer licensed.
Now, I had used the free upgrade from win 7 Pro, and as such had a win 10 pro install for the last 3 years or so. All above board. Now, the system is telling me I only have a win 10 home license showing on the system, and that I need to install home to use it.
Why would this happen, and how can I get my win 10 pro license back in good standing on the new hardware? Again, only the motherboard and processor have changed...
I ended up purchasing a new license from StackSocial as suggested by pseudolobster below, and the issue is now resolved. Thanks to everyone for all the helpful responses!