I happened onto Snowcovered.com and found out there are three patches available for D.R. 4.0. Do I need to download and install all three of these or just the most recent? I assume I install the patches similar to the way the module was installed. Is this correct?  I have two existing D.R. modules. Do I have to do anything 'special' to the existing modules or do I just need to install the patches? Thanks.