Easiest is to download again, or rescue from the trash... and likely in the Applications/Wondershare folder - you'll see a 'Remove Wondershare...' application.
Failing that, use Find any File from
http://apps.tempel.org/FindAnyFile/ and look separately for wondershare, Simbl, SafariSniffer
Simbl is possibly in /ScriptingAdditions and/or /InputManagers
and Application Support, and you'll perhaps find a **.plist file too.
There's a few apps under the wondershare umbrella, mind - so do use Find any File