Upgrading is not hard....
1st Question is what method of running XBMC as the dash are you using. If you are not using the shortcut method then you need to fix this first. The XBMC Home setting no longer exists in the xboxmediacenterl.xml file and you MUST NOW USE THE SHORTCUT METHOD OR REFLASH YOUR BIOS TO BOOT XBMC. You can read more about that here....http://manual.xboxmediacenter.de/wak...lsetupv2&v=cab
Once you have that straigtened out you need to load some other program or else the main XBMC executable among other files are locked and cannot be overwritten. You can launch an alternate dashboard or a BOOT Disc with FTP or another copy of XBMC running out of a different dir. Doesn't matter which one... I tend load the Exo Dash I have installed in my F:\\APPS dir from the program menu in XBMC.
Then take the new release....
I generally rename the xboxmediacenter.xml to xboxmediacenter.old
Also in the user preferences directory I will delete party_mode.xml and rss_feeds.xml so that I don't lose my customizations...
Generally the OLD xboxmediacenter.xml will just work. They have changed it alot recently I would do a merge. Only the menu settings are left everything else have been removed.
Once you have done that just FTP and overwrite the main primary XBMC setup.
Make sure you do it right or it won't reboot. Always make sure you have a working boot disc with FTP in case you mess something up. This way you settings will carry forward. If you are running anything older than a month you will have move/rename the OLD Music database and thumbnail directories if you want them to work in these releases that have some out in the last month.
Again, Make sure you have XBMC booting as a DASH using shortcut method or reflash or it will not boot and make sure you have a working FTP boot CD/DVD in case you F&^*& it up.
Its really not that hard. Hopefully they are done moving all the settings around. Until lately I have been renaming just one file and overwriting the install and it works perfectly at least 20 times.... If you don't care about saving thumbnails and old settings just overwrite everything. and merge you changes into xboxmediacenter.xml