I just upgraded Data Modeler to the latest release/installed Data Modeler to a new computer but all my domains are gone. Is there any way to get them back or do I need to define them manually again? Of course there is a way!

Select File, Import, Domains.

Domains1

Then find the file your domains are saved to using Open Domain File.

Domains2

Import.

Domains3

Go and check the domains.

Domains4

And there they are.

P.S. You might be interested in this too: helifromfinland.blog/2017/10/13/default-system-types-directory/