Hi,
Make sure you have downloaded the latest maintenance tool from Panasonics website
Then download the version you want of Panasonics website, once downloaded it will be a folder that says "Private"
Once you have done this you must then take a backup of your existing system "DBSYS"
Open this backup on your new tool, it will ask you to convert it to latest version, say yes to this, then save it as DBSYS2 or something
Then remove the SD card from the PBX and replace the private folder on the SD card with your downloaded private folder
Put the SD card back into PBX and set the PBX to "Initialize"
Once initialized set back to normal, you will see it says the version on the bar at the bottom,
You can then import your DBSYS from the utility menu
Easy