We don’t have those version numbers but you can get the latest 2.0.5 from us here: Audacity ® | Download for Mac OS .
Macs don’t really install and uninstall applications like Windows. You can have multiple Audacity versions in different folders in /Applications, but it would probably be better if you dragged other Audacity versions to Trash before installing 2.0.5 as above.
Please see Installation: Do NOT run Audacity from the DMG!!!! for the correct way to install Audacity. Don’t drag the DMG anywhere, just drag the “Audacity” folder out of the DMG to /Applications.
Gale