Forums help needed- thread tools/ options?

How can I get rid of the threads I have posted in? I mean, I don,t want them to be shown in the list of

Show new replies to your posts.

It,s so annoying. Other forums have an option of Thread Tools but no such options here n I feel frustrated. I have too many complaints with this forums desingn/ software but ATM my main concern is as I stated above.

Any help? Thanks