I have a fairly generic 64 bit Win 7 install which is completely up-to-date with all updates and patches, et cetera, so I am, sorry to say, stumped.

All tried.Nick Hunter wrote:Hi,
Sorry to hear that you are having problems with TreeDraw.
The program may be corrupt. Please try uninstalling TreeDraw V4 then clear your browser cache and download TreeDraw V4 again from http://treedraw.spansoft.org and reinstall.