Could you please share us with more about the "another window"?
Is it a same file windows? Or startup interface of Visio?
It's recommended to take a screenshot to show the detailes. If there is any privacy information, please remember to cover it.
How did you open the Visio drawings?
Please try to right-click one Visio file, click Open to check this issue.
Please also open them from Visio app, check whether this issue would be reproduced again.
Besides, I suggest you temporarily disable some add-ins via clicking: Files > Options > Trust Center > Trust Center Settings > Add-ins, ticke the box of "Disable All Applications Add-ins".
Any updates, you could post here.
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