I know of a couple things that can cause yast2 software management seg faults (and there are probably others):
a. bad repository in your repos list, and
b. corrupted rpm database.

Lets check the first one. Type:
<span style="font-family:Courier New">zypper -v lr</span>
and either paste the output here, or if it is too large, paste it on http://pastebin.ca and post here the URL of the pasebin page.