August 30, 2019, 04:41:27 pm
Hi MJA, it's either a Windows permission issue or overzealous anti-virus software that's causing the problem. In other words, it's not caused by the Lumion installer but by something on your PC.
ShellEx manages context menu entries when you right-click or double-click on .LS9 scene files. Windows and/or your anti-virus software is not letting Lumion add those entries to the Registry.
If you click on 'ignore' Lumion will still work fine but double-clicking and right-clicking on .LS9 files won't work.
If you right-click on an .LS9 file, choose 'Open with...' and select 'Lumion 9' with 'Always use this app to open .LS9 files' ticked, it will ensure that double/right-clicking on .LS9 files works as expected.