Same issue here. I have not found a solution.
viewtopic.php?f=21&t=77608I tried reverting back to v14, v15 betas ( all of which worked before installing the v15 release version).
None of them work anymore.
Someone suggested that it won't run on my laptop because I have an Intel GPU and a Dedicated nvidia GPU without an option to turn off the Intel GPU in the BIOS.
But v14 and all beta versions of 15 worked for me on this same system for the past year.
Problem started on install of release version of 15.0.0.86
If you find a solution please let me know.