You will not have to reinstall extensions if you delete the winfile cache.
You should not notice anything after deleting that file, it is a file Dreamweaver uses in the background.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.