I downloaded the current CReMS v5.0.3, installed it but it's failing to run (am not able to use it, because it disappears). However, I had the earlier CReMS v5.0.2 installed and running until I reinstalled my Windows version.
There is an updated version (version 5.0.4). I recommend you remove the previous one from your computer, then use the link posted below to save the updated version. In some cases, you can simply install the software over the previous installation.