I have several RB450G routers. I was upgrading the software version to 5.14. They were 4.5. 6 of the 7 upgraded just fine. The last one down graded to v3.25 after rebooting. there is a system error in the log file. "license does not support new version of routeros-mipsbe-5.14". I was using WinBox to upload the files and to do a system reboot.