Uninstalled, now it disapeared and won't redownload.

I purchased a new computer for a self gift for Christmas,and I was debating wether to download LimeWire or not, Well I finally broke down and did. Well someone once told me that I was to uninstall LimeWire when I was using it so that no one could hack into my computer, when I did that it just made an icon at the start menu to the far right. and last night my computer went into sleep mode, and now it's gone.

I can't find it anywhere on my computer, and when I do it just pops upthis window saying I should redownload or go to their support tap on the official LW site.

I've done all that, Can someone please help me.