A: Yes, but not directly. You must use the Emergency Recovery Mode with the older force_update.zip . Downgrading may restore old bugs but can fix issues introduced in a beta release.
Once you have completed the and extracted the install.img file, follow these steps precisely. Egreat R300 Firmware Download
Before you proceed, please note that . If the process is interrupted (power loss or corrupted file), you could "brick" your device. A: Yes, but not directly