Patching Crystal Reports for Visual Studio

I did try searching on this topic but could not find what I was looking for.

I am using Visual Studio 2015 with Crystal Reports 13.0.22.2668 (Engine version 13.0.3500).

How do I know which SP I am on now?

How do I apply the latest patch?

I have downloaded CRforVS13SP25MSI32_0-10010309.EXE. Do I simply run it to get to SP25?

Are there any concerns about patching / precautions to take? If something breaks, can I roll back?

Thanks in advance