Lets revert this - Not allowed to run multiple instances of Inventor

[MatsNorway1]

This is super annoying. And problematic once inventor refuses to close properly. Suddenly you have to restart the computer to open a idw.. 

Im sure it was needed for dummies opening multiple oilplatform installations but i am also opening rather small and cute models that would have worked on Windows XP 4Gig version.

[robert_hirschHZB4G]

i can run as many instances i like. i dont have this problem. Sometimes i use 2 instances to check something in another Project. But i get problems if i try to save the default.ivb if i have multiple instances open. I can live with that.

Inventor 2026.1.1

Windows 11

[adoonan4MDKZ]

I frequently run multiple instances of Inventor. Mostly so I can keep working on new tasks after checking-in a large assembly. I try to avoid working on related assemblies in multiple instances.