Yes.
If you backed up your Flash and EEPROM after you installed the opengd77 firmware you should use the CPS to restore them prior to reloading the official firmware.
Then use the official fimrware loader and firmware from radioddity.
Note.
In some cases loading the official firmware now appears to prevent further updates to the official firmware, or for the operator to re-install the OpenGD77 firmware.
We do not know if this is a bug in the official firmware.
But it has happened to several people.