Please state the exact version of LR you are using.
Also please tell exactly what is happening or not. Are there any messages? A screen-shot maybe helpful as well.
Sorry for not getting back... busy. I have the latest Photoshop and Lightroom on the subscription plan 2015.6 since I did the upgrade I find that if I go to Edit /Export file to my desktop of an edited raw file. It is taking 10 minutes or more. I never had this problem previously so don't know what is happening.
There are some known and confirmed memory leak issues in 2015.6.
I assume they will be fixed soon. If you need to 'work faster' until then, you can roll back to 2015.5.1 as described in the following link. Simply replace 2015.1.1 with 2015.5.1 throughout the guide. How do I roll back to an earlier Lightroom release? | The Lightroom Queen