Please excuse my lack of knowledge with all of this, when I unlocked and rooted I downloaded fastboot adb files and exctracted them to a "root" folder on C/ drive. I really don't know if I have SDK or not
If you rooted with that folder, it should work. Plug your phone in and boot into fastboot mode. Open a command prompt and type "fastboot devices". If your phone is listed, I think you should be good to go. You can drop the restore images into that folder and push them to the phone. Someone correct me if I am wrong.