Originally Posted by Bamiga2002
How can I update from 2.4 -> 2.9 without doing a fresh install?
Dont do a fresh install. Just backup your startup-sequence and install on top.
After the instalation is complete add to the new startup-sequence the modifications, if any, that you added in your old 2.x version (only if there is something that you added/modified on your previous 2.x version). Reboot and voila!
BTW, this information is in the BetterWB.guide, in its FAQ, which is present in your help drawer, and in the first disk of the BetterWB set.