Not absolutely necessary since the IDE always used the version that was installed last. But if you want to do it: Check LazMapViewer in OPM, then click "Uninstall".
In order to install the new ccr version unzip the snapshot to some folder, then, in the IDE, go to "Package" > "Open package file (.lpk)" > navigate to the folder with the ccr version > open "lazmapviewerpkg.lpk" > "Use" > "Install". If you use the add-on packages in your project you must also install the other lpk files in the same way.