Hello Etienne,
That happens because our "Set version" mechanism was changed in Advanced Installer version 19.2.
https://www.advancedinstaller.com/release-19.2.html
We added the dynamic content support for the ProductVersion property. Also, now major upgrades are possible by default when using the fourth field in the ProductVersion.
That feature now uses the DynamicPropety mechanism which unfortunately is available starting with Professional edition. That is why you cannot see the Browse button anymore in a "Simple" project.
Unfortunately, if you want to keep the "Set version from file" functionality you have to use the 19.1 version or you can just manually update the version.
Here is a download link for Advanced Installer 19.1: 
https://www.advancedinstaller.com/downl ... dvinst.msi
I'm sorry for the inconvenience.
Best regards,
Liviu