I don't know why you needed ADB driver to use MFG Tool Pack. Just reboot in download mode like told in instruction:
1. MFG Tool work on Windows PC only. It must not be installed. Just download the package, unzip it in a folder.
2. Connect your device to your PC (if possible don’t use USB 3.0 ports). Power off it (long press on power button) and start MfgTool2.exe from unzipped folder
3. You must set your Boox in download mode now. Just re-boot your device in this mode using a special buttons combination: Press PgDn (<) + PgUp (>) + power button for 3-4 seconds. The led blinks once but screen remains unchanged. Your device is in download mode now and MFG program window should report HID compliant device connected.
4. Press start button and wait for your update being installed.
I just checked it - it don't use ADB.
But if you insist - that ADB I use with MAX
https://yadi.sk/d/VCj3pC4vCUTCfw.