I'm a new E-GroupWare user - problems with restore defaults

[miki111]

Hello Everybody!
 and I got some questions.  

I am working on E-GroupWare Version 1.4.004, on Site Manager, for my firm’s internal web portal.

I have already made some template with categories and pages. I edited some options at SiteMgr - Site module manager. When I finished it, I didnit like the tree, so I deleted it all. After, I couldn't fine default settings.
Qs:
Where can I restore default settings for the SiteMgr? Do I HAVE to uninstall the SiteMgr, and install it once again.
(But, if so, after, when I make mistake or don't like something, is it sily to uninstall it again and to install...)
I appreciate your help!
 Thank you!

miki111