1. Known issue:

1.1: Background: 

Microsoft released an update for OneDrive. The update makes OneDrive 'hijack' the mouse in Lumion every time the file dialog window pops up in Lumion, even if OneDrive is no longer installed.

You are then unable to move the camera and/or cannot click on buttons/sliders in Lumion 6 or newer after a file dialog window has been displayed in Lumion. For example, after importing a model or after picking a texture for your materials.

1.2: Who is affected: 

It only affects a small number of Lumion users who have installed the following software:

• Microsoft Office (assuming a version with OneDrive is installed or has been installed).
• Windows update KB4522355 (this is an optional update from Oct 24 2019).
• Lumion 6 or newer.

1.3: Solution: 

Follow the instructions in section 2 in the following article to resolve the problem:

• Knowledge Base: What do you do if Lumion does not respond to mouse-clicks?