Support Package Manager: SPAM/SAINT Update

Hi,

I downloaded the SPAM/SAINT Update and executed it with SAPCAR in the directory of the  Application Server Folder. The original file KD74053.sar (6767 kb) is still in the folder, but a new file 'signature.smf' (5 kb) appeared.

What is that one for?

Next, I think that I should be able to take a next step with transaction SPAM (Support Package --> Load Packages --> From Application Server), but it's 'blanked out' and not accessible.

What are the next steps and how do I really get the SPAM/SAINT update working, so I can proceed to my actual goal, the Support Package Update.

Thanks!