Yes.
CRM is every bit as relevant to operation of an SEP as it is to a big jet - I'm familiar with both environments and carry much knowledge and experience between the two.
However, CRM training, done well, is done in a company environment and built around that organisation, it's aircraft, and their procedures. That doesn't map necessarily all that well into private PPL flying. In an ideal world, there would be tailored CRM training readily available for SEP operations / private pilots.
I have come across references to such courses, but don't have direct experience of one, and I don't think that they're all that widely available.
In a nutshell, your company CRM course will do you favours in your SEP flying - but only if you take time to think about how to map those principles over to a quite different flying environment.
G