When i launch LrC with teh "Library" module select, it seems to take a long time to load. It just sits there (i don't know what it is doing). If I click one of the images on the filmstrip then i get the "Program not responding" notice.
I have been working around this by making sure that i shut it down with "Develop" selected where the problem does not seem to occur.
I am running Windows 10 and LrC 10.2
I have tried some of the things recommended in some of the posts here like turning the GPU accelleration off, optimizing the catalogue, all to no avail.