What is the solution to this issue? I have not received a response as of yet to my last e-mail to Support about this issue stating that I do have Dropbox. I wish I could use this product but cannot until this issue has a resolution.
You have received SEVERAL replies. I'm sorry, but I tried to search for your error online because, obviously, nobody ever reported it before, and the only thing I could find is that an installer *might* fail because of some conflict with a Shell extension, which is what I've explained in my 4 replies to you.
As you can see by a search in this forum with "invalid floating point operation", the one and only message is yours so, it's surely a problem with a conflict with something you have installed, otherwise we would have seen at least some other reports by now.
In any case, you said you get it when GSX is installing the Vehicles updates. If you download the current Full installer, it shouldn't install the Vehicle updates, because they are contained in the current Full installer, if the problem was that step, maybe bypassing it might solve your issue.