I received my Celestron 130SLT from my children as a gift. I am very new to all this and in the process of learning as I go. When I received the Celestron 130SLT there was a version of Starry Night Celestron SE software available for free as a download. It came with a verification number. I was able to download the software with no problems and receive my verification code. However, today, I received an offer to upgrade to SkySafari. My question is, what is the difference between these two software programs? Am I o.k. using the Starry Night Celestron SE? Additionally, is the Starry Night Celestron SE software similar to the Starry Night Pro or Enthusiast version? Thanks for the help.