How to make WSAD ask for workspace location?

When WSAD starts-up, it ask for the workspace location to open. In the same dialog box, there is a checkbox below the workspace location and it reads like - Use this workspace as the default and donot show this dialog box again.
Accidently, I checked the checkbox, and alas, I was unable to change my workspace. So, what to do now? How to get the dialog box prompt back?
Right click on the WSAD icon and go to Properties -> Shortcut -> Target. Add -setworkspace to Target, and we are ready to go.
After making the changes, Target should read like the below-
"C:\tools\IBM\WebSphere Studio\Application Developer\v5.1.2\wsappdev.exe" -setworkspace

Next time, you open WSAD, you will be prompted to select your workspace!