Download Smart Widget Installer 1.2
OS X 10.6 or later is required. For OS X 10.4.10 or 10.5, download an older version.
Tired of Dashboard closing your open widgets whenever you install a new version of widget? Smart Widget Installer is the answer.
Just drop any number of widgets on the app to install them. If the widget is not installed, it will install normally. If it is already installed, you get the smart upgrade option, which will update the widget without closing any copies you already have open. If you’re tired of having to move your widgets back in place every time you update them, this is for you.
With OS X 10.7 or later, you can set Smart Widget Installer to open automatically: