downgrade rekordbox

How do I downgrade if needed do I uninstall the current version and then install the older version and does the Pioneer database do the rest in terms of keeping my playlist and analysis

If you're on Windows, it will install to a different version number folder. If you're on a Mac, just rename the application file to the version number and it will allow you to have multiple versions side-by-side.

I am using Windows so I do not need to uninstall the latest version is that correct and will the application just open in there the version I have just installed or do I need to change any paths

No changes - just be aware that if you made a shortcut on your desktop or start menu, it may point to the other version. Be sure to use the full start menu to find the version you intend on launching.

Downgrade link provided in official comment doesn't work