Sign in with Google works in 2019.3 and 2020.0. It doesn’t work in earlier versions because Google turned off the ability to sign in from inside an application, you have to use a browser, and the opening of a browser window to sign in was only added in 2019.3.
I hadn’t seen the 2018 sign in dialog before. It works well, and you can remain in 2018. You would want to use the same email address you have used with sign in with Google, mainly to make sure your Extension Warehouse and 3D Warehouse accounts are available. After doing the password reset you can now use your Google sign in email in all other Trimble ID sign in screens.
