First and most important question: what version of the launcher?
(Pedantic aside: "off the grid" means "off the power grid", as in generating your own electricity. It doesn't mean no Internet access)
Both of my homes are in remote mountain areas that are off the grid, as in generating my own electricity with solar, wind and generator filling a 1200 amp hour bank of 12 L16HD 6 volt batteries that weigh 120 lbs each, wired in series and parallel to make 24 volts, that is then inverted to residential 120 volts AC, homes and power system built by me. Additionally, I design and build small homes in the same areas, including designing and installing the alternative energy. I have certifications in maintaining remote power generation generation equipment, both mechanical and electrical components, and I'm working on a EE degree. I'm extremely qualified in what "off the grid" means. The grid is all utilities, not just power. However all forms of internet require power, so they are covered under your narrow, and wrong, definition of off the grid.
Additionally, if you're going to use the phrase "xxx aside", it means you have previously engaged in whatever "xxx" refers to, and that you are no longer going to further engage in "xxx".
In this case it was the activity of being pedantic, which after stating you would be putting it aside, even though you had not previously been pedantic, you went on to attempt being pedantic on a subject of which it's obvious you have little understanding. I believe I have done a much better job demonstrating how to be pedantic. Before you get snarky and correct someone, it's best to know wtf you're talking about. Not just what you've read on the internet or think.
As far as the launcher, I'm using v1.4.8. I force updated yesterday so I believe this is the current version. The launcher has not worked offline for several versions as far as I'm aware. If in fact it's version dependent, perhaps you can elaborate on that.