You don't have to delete anything from the transmitter, just the devo 10 firmware and library dfu files on your computer that you downloaded from walkera. Then re-download them from the Walkera site. Then try upgrading again.
What has happened is the library dfu file on your computer has become corrupted from clicking upload. If you want to double check, the devo-10 lib v0.2.dfu file should be 267Kb on your computer. If it is larger, it means the library from the transmitter has been added to it and it will not work.
Originally Posted by djrocketodd
sorry it is with walkera firmware right now, to delete it can i use the walkera dfu tool, or do i use a different one? Ive tries the regular firmware upgrade to no avail but I havent tried to manually delete the library file first.