Confused on CR XI Updates

CR XI Developers Edition Product Version 11.0.0.895

I had to re-install CR XI on my home PC. I clicked on the Update link. It came back saying there were none.

When at the SAP site and I type into the Search box "Downloads Crystal Reports XI", I see there are Release 1 and Release 2 Service packs. Also under Release 2, there are SP3 and SP4 updates with a more current date then the SP2 Service Pack. Does Release 2 contain the updates that are in Release 1?

Out of all these, what do I need to install to have my version of CR XI up-to-date?

Thanks,

Sam