[NTG-context] Is there any change in processing of Projects, Product and Components?

Hello ConTeXtsist ... Has anything changed in the functioning of ConTeXt MkIV processing of larger projects (containing more components)? Some time (one or two months) ago I was using standalone to compiled an extensive project and everything was OK, but now it looks as if the component does not load at all! It is necessary to explicitly specify the file extension? Why components (in separate files) into all the main project file do not load? Thanks Jaroslav Hajtmar