Android device(phablet) in boot loop


Hi, and thank you for the quick acceptance.
I have a Chinese phablet (Tenovo CY 7806) with the mtk 6572 chip.
I have rooted the device, however since the GPS would not lock onto any satellites, i searched all the forums and went through their respective tips. I came across one that claimed the build.prop file need an extra line after te JIT profiler before the GPS would work. Isaved the original build.prop and edited the copy with ESfile explorer. On reboot i only get a boot loop. My pc wants USB debugging, but of course i cant get into the device to set that ( although the debugging was set before the reboot). If i can get to edit the build.prop again i'm sure the device will boot up.
Thanks again!