If you are running the
Thor Tool Management Framework, you can download and install the latest development builds of GoFish at any time using the “Check for Updates” feature of the Thor pulldown menu. (Requires Thor 1.10 or higher).
You can see these same instructions by clicking on the Options button from the main GoFish form, then go to the Update tab as seen below:

If an update is available, you will see a messagebox like this: