So sounds like you are on a windows computer and have downloaded GCC multiple times.
Have you looked in your download folder on your computer?
If you have a smart phone you can use the GHL app to set up and use the Doser.
To get the yellow light to go out you have to insert the amount of fluid that the container holds and click on refill. Then the software starts subtacting the amount you dose from the amount that you say is in your container.
Here is the current software for use on a computer:
https://www.aquariumcomputer.com/dow...nter-v1-0-9-9/
Oh and GHL's US headquaters is in Fort Myers florida and they are dealing with Irma right now.
Here is the
GHL company tech support pages