When you say the "Search button won't work" can you give me more details?
I just tested this by doing the following:
1) Open Hoster 2.219
2) Click on the Play List tab, if it doesn't open to this.
3) Click the Search Button.
4) The Search Dialog pops right up and is ready to use for me.
What happens when you do this?
It is possible that the dialog is being opened off of your screen somwhere, and you could delete the Registry Keys to fix this. Here is a link to a post that describes how to do this:
http://forum.mtu.com/showthread.php?p=27852#post27852