Please use version numbers in your software releases
Yesterday a security patch was released, so we upgraded from 5.1.3 to 5.1.4. The new version number contains the security patch, so we can easily look at our WHMCS admin panels and see that we are secure since we are at 5.1.4
Today another patch was released to the patch, but the version number did not change, although the code did!
Could you PLEASE use unique version numbers for each unique release of your software? Otherwise we can't easily determine which of our own WHMCS installs has been patched, as well as customer installs.
I seem to remember this same problem happening in the past as well.