regedit -> software -> JFormDesigner -> delete license
LONG ASS INSTRUCTIONS:
To fix this, open the start menu, and type "cmd" without the quotation marks. open cmd.exe and a black window with white letters should pop up. type "regedit" without the quotation marks and press enter in cmd, another window should open up called registry editor. If you want, you can now close cmd. In the registry editor, find the HKEY_CURRENT_USER folder on the left and expand it. Under that, expand Software, then JavaSoft, and then Prefs. Click on the folder that says jformdesigner. on the right, there should be a table. under the column labeled name, right click license and select modify. Remove everything in the value data textbox and click ok. Close all the windows. Now create a new e-mail and request a new evaluation license. Eclipse should accept it and you will have access to jformdesigner again!