If you get a warning, try the unencrypted download.
An often-requested feature now included in Popular Feature Requests is the ability to re-edit text. This plugin is an alternative text-tool that includes that feature. It works by using Steganography to store the details of the text in the text layer.
To add text to an image, create a new layer and click Effects -> Tools -> Editable Text. Then enter the text and text style. To edit the text, simply run the plugin again. Do not make any changes to that layer apart from layer properties and editing the text with this plugin.