Can i just unzip last nightly over my current installation
I do not know the answer.
Look in the wiki (http://wiki.jboss.org/wiki/Wiki.jsp?page=InstallingJBossToolsNightlyBuilds) There is a description of how to install JBoss Tools as an extension location.
If you do that, you are able to easily switch between nightly builds.
I've just been unzipping each nightly build in my eclipse directory overwriting the previous nightly and it seems to work properly.
I apologize if this is bad advice.
Err... I did give you bad advice. Do not do what I've done. I have tons of different builds in my eclipse/plugins directory. That's surely a nasty thing!
If there's a wiki, follow that. Otherwise start with a clean Eclipse, or maybe remove the previously nightly plugins before install the new nightly plugins.
I apologize for the previous bad advice. :-/
Ok.Thanks for taking the time to answer!