Neee, Google knows all . Is true that I used Companion but for v4...for v5 I just know it was existing. When we switched to v5 we had some basic trainings from a certified DS partner. I would recommend this to anyone, get some good real trainings and you will cut a lot of time in your learning process.
there are some difficulties with enabling the companion on newer versions of windows/ java, fyi.
specifically win 8/ 8.1, ie10, 11 and latest java (b45).