I placed a report last week after upgrading to version 5 in the middle of last week that version 5 will not open on my laptop, after trying everything, wasting many hours reinstalling many times. The error: "simplify 3d failed to activate the software. the software will now exit" pops up then it closes.
I immediately sent a report to support. They said that this error occasionally happens. Nearly a week later they have still not come up with a solution. I asked for a refund. (Simplify 3D locked the last forum topic on this subject, saying to contact support (which I have done several times).