How can i delete topics?

Hello,

how can i delete as administrator a theme in jforum?

For example in this forum if i would like to delete under

Forum Index � Announcements

the topics

Jira is back in business.
JForum 2.1.7 Relese 3 is out
JForum 2.1.7 released
JForum 2.1.7 will be released 5 February 2007
Important CVS information to all developers and beta users of 2.1.7-dev
JForum 2.1.8 relesead

i would't know how. There is no delete Button (as admin). And in the Administration Panel i either cannot find a way to delete topics.
It is because i had a spam-attack and now i try since hours to delete this crap but even if i delete in the database the topics from topics, posts and posts_text it is still there.

If this is not possible, i will switch to phpBB where all that is easy done.

Thank you, franc
[originally posted on jforum.net by franc]