Updated to LR 4.3 can I uninstall the 4.0

I updated from Lightroom 4.0 to 4.3. Can I uninstall the 4.0 without affecting the new 4.3 version?

On a Windows PC, installing a new LR X.something effectively uninstalls the previous X.something-less meaning that after installing LR 4.3, LR4.0 should be gone except maybe the Resources folder which may not have any files, anymore.
On a Mac this didn’t used to happen and both versions remained installed.  More recently the Mac install has started to uninstall the old versions, too, to be compatible with how things work from the Apple Store, although I don’t have a Mac so can’t say if the process has changed, again, with the most recent update.
In any case, generally you can uninstall the old version if it still exists and be ok—it won’t hurt your photos or remove your catalog database, but a few people have had issues with their camera lens profiles disappearing, so if that happens after you uninstall LR 4.0, just re-install or do a repair install of LR 4.3 to put the profiles back.  If you're on a Mac it also might be that you have a shortcut to the old, now uninstalled version on your dock and it won't do anything when you click on it.  The solution is to create a new shortcut to the new version you've just installed.

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