I’m trying to check what version of GD I’m using but can not find the number. At the website the version of downloadable file is not shown either so I don’t know if my version of GD is the last one or I need to update it. Where can I look for a version number of GD? And how to update GD? Shall I first uninstall the previous one or I just need to run the installer and it will automatically replace the old version with the new one?
Self-explained
Then select “Check for updates”, a window will pop up, it displays your version and latest GD version available

Thanks!
I never had need to check version number - when new version is available, the update prompt shows up.