You can follow the same method described for the 8-inch tablet, here in this subforum. Actually, you can use that method for an enormous selection of tablets (it really helped out with a different off-brand, but with the same issue as the Insignia line)
Anyway, all you need to do is substitute the "2207" where required. This number is the USB vendor ID and can be found (in Windows) by going to Device Manager and looking at the "Properties" of your tablet. You then go to the "Details" page and there should be a drop-down menu. In the menu locate "Hardware Ids", the a string of numbers and letters will show up in the box beneath the drop-down menu. For the 8-inch, it looks like this:
USB\VID_2207&PID_0011&REV_0222&MI_01
USB\VID_2207&PID_0011&MI_01
So, for yours that "2207" will be a different number. Use that number in the guide where it says to append the adb_usb.ini file.