Direct link to Speedgrade grayed out in Premiere

I'm editing in Premiere at a new workplace and grading in Speedgrade.

Occasionally I take the project to my home office where I've just taken up subscription and installed Premiere CC 7.2.2(33). I wanted to try colour grading a few shots and am using trial version of Speedgrade v8.0.0 but Direct link to Speedgrade is grayed out. Is it because of trial version?

If not, what other reason can there be?

I can't find the installer versions of PP or SP since they were both installed by Creative Cloud. So, If I do have to reinstall the software, is there some way to avoid re-downloading?

Mac OS10.8.5

3.33ghz 6 core.

RAM 16gb

Thanks

Michael