Wondering if your 2006 version is flawed.
Do you know how to burn an ISO file to a CD?
If so, I can email a copy of the version I have ... 2006 ... without the update of course. You could then burn a new CD and see if it helps. If you have a 2006 saved version of the tree file, then should work. If not, then the file itself is flawed.
I feel for you because a few short years ago I lost all my file also ... due to a dumb move I made when I was re-formatting my hard drive. Tooks me weeks to 'partial' restore ... and still not right after almost 20 years of research.
If you want it, email me your email address. Mine is doonboggle (at) yahoo.com.