UPDATE: I got my machine activation updated to 6512 Grace(Days) using the clean mode of hwid.kms38.gen.mk6.exe !
I took the advice from @
microtechton and @
chillgates and downloaded the iso from MS, and used Rufus to burn it to a usb thumb drive.
Then I took a spare hard drive and installed Win10 Pro 64bit on the blank hard drive, and stayed offline (unplugged rj45), so I could play with the auto program hwid.kms38.gen.mk6.exe without fear of breaking my existing system or having microsoft "discover me and throw me in jail", lol.
I disabled windows defender real-time protection, and launched the auto program "hwid" as admin. Once it was opened I noticed a mode: pulldown menu with an option for clean! This was great, because I had tried to download Ratiborus KMS Cleaner, but it didn't work on my version of KMSPico, so i was afraid I would need to reinstall windows from scratch...
So after I activated the ms iso version of win 10 pro 64, I understood how the program worked and what it did, so I tried it on my real system, unplugging the network cable, disabling MS defender, and running as admin.
I used the clean mode to get rid of the licensing keys or certs or whatever was keeping the renewal time / grace at 170 days, and then followed that up with the menu item for KMS38, which succeed in activation to the 6512 days!
I also ran windows defender in offline mode to scan my complete hard drive for virus / infections leftover from KMSPico, and nothing was found, and I followed it up with the same process from malware bytes.
So I feel happy that I can continue to use this os version that I have customized since January and I don't need to start over.
Thanks to all that helped, and thanks to Dumpster Inc for the auto program!