I have been working with Lr for a number of years and recently upgraded from Lr5 to Lr6. All seemed well until a couple of days ago when trying to work in develop module I noticed functionality e.g. when cropping no right mouse click (RMC) to allow pre-sets to be accessed or the default sizes. Also when in 'basic' module no access to the fundamentals. Access to files is restricted. No change in activity and if I revert to Lr5 ALL functionality is good. I am a technical dinosaur and do not want to do anything which will lose files. I import all files to an external hard-drive and have an airport time capsule to do regular backups.
Is there a way to get this looked at or does anyone have suggestions as to what needs to be done. Have tried purging cache.
thank you in advance.....Please help.
Try disabling the gpu - go to Edit > Preferences > Performance (Lightroom > Preferences > Performance on a Mac), and uncheck Use graphics processor.