@Tony;
that's just the way upgrading works with .deb -packages. We must reset the theme to something else (in my case, I reset it to NSeries) before removing the old version and installing a new version.
Do you really think that updates to extras -version are coming so frequently that it takes too much from you to run the Setup program once after upgrading? If so, then I cannot help you. You just need not to upgrade.

I wish I could use Pleego separately from BP 'cuz it kills me when it updates and I have to reset everything. Good lookin' theme with some nice options though. Nokia should be looking at it for Meego options.