vince,
I have merged this post that you started in a new thread after Jim already answered your question.
Please do not start multiple threads for the same question.
You can always download and install from this location:
https://www.feldoncentral.com/Sachs/...Aquarium31.exe
What's there will always be the latest version. Press the spacebar when the aquarium is running and click on the "About" box, in the right square on the bottom you should see the following if you have the latest version: U620.3.0.5493