I am running LR 2015.1 on Windows 8.1 on an Intel NUC (i5 4250 CPU, HD5000 gx).
When I use GPU acceleration the Develop window turns blue with a big X. There is no message. If I turn off GPU acceleration it works reliably but is very slow, far slower than previous versions. There is nothing useful to me in the latest version of LR so please, how can I roll back to a version that works for me?
I'm using CC2015 on a Mac and I want an answer to the same question. This latest version is costing me hours.
I got taken to a form to start a new thread but thanks for your help.