I'm not asking for the current CA version, I want to know how to find it each time there's a update.
How to find the current CA version ?
You can check when updates occur on their website. That's the only way you'll know when the update happened, before you update.
You can check the last modified date for the executable files by right clicking it and checking the properties. That's as closest you can get without checking on their site.
They don't have version numbers for the files stored in.