When I try to open a DTL in the tabbed editor I always get this error:
You are using Internet Explorer 7. This version is obsolete and is not compatible with diagram editors. Please update Internet Explorer to a recent version.
My actual Internet Explorer is version 11.
I'm running Eclipse Photon.
Atelier IDE 1.3.141 com.intersystems.atelier.feature.group InterSystems Corporation
The same error occurred with Atelier 1.2 on Eclipse Oxygen. I've never been able to get this to work.