Opening multiple instances of Excel

[Nachtschade]

I've recently migrated to Windows 10 and am using Excel 2019.

When I open a second sheet it is opened in the same client instance as the first. I've edited the registry to prevent this (there are some guides on that on the Internet) and this works but only when I run Excel by itself, not when I run an excel file directly from Explorer, which is kinda pointless.

The main problem for me is that I have a lot of sheets and about half of them have automatic updating while the other half has not. When the second sheet is opened in the same instance it gets the same updating mode as the first sheet regardless of what I have set. This is painful. It also makes calculation on small sheets very slow when another very big sheet is also opened.

Does anyone know how to fix this?

 

[Jaafar Tribak]

Have you tried setting : Excel Options |Advanced |Ignore other Applications thta use DDE

 

[Nachtschade]

I actually have because I read that somewhere. But it didn't seem to make any difference. Is this supposed to do the trick or is it a guess?