SmartFind keeps your preferred find options.
Visual Studio remembers the options from your last find operation (case sensitive, whole word, in current document, etc.).
Most of the time this is unwanted so this extension allows you to save your options once and use them for all future find/replace operations.
You can save your options using the Tools/Reset SmartFind menu item.
Build it yourself or install from https://visualstudiogallery.msdn.microsoft.com/015611c4-b357-4672-8977-f3ec92f0b808