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Override Catalog on Startup - Windows 10

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Aug 5, 2018
San Diego, California, USA
Lightroom Experience
Power User
Lightroom Version
Lightroom Version Number
Operating System
  1. Windows 10
There used to be a key that I could hold down while opening Lightroom that would allow me to choose to open a different catalog instead of launching my usual catalog. Is that option still available? I've tried SHIFT. I've tried CTRL and I've tried ALT, all to no avail. If this is still available, what is the magic key combination? (I need it for troubleshooting purposes).
You almost nailed it... It's Ctrl+Alt.
[Ctrl] alone, works for me with Windows Lr start. [Ctrl+Alt] also works.
Must hold the [Ctrl] key down before clicking the start (icon) and hold until the dialog opens.
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