In general, yes: the best solution in my opinion is to upgrade to Lr5.6.
Another option though: Download the latest (free) Adobe DNG Converter, and convert your ARW files to DNG - then you can import them in Lr4.
In general, yes: the best solution in my opinion is to upgrade to Lr5.6.
Another option though: Download the latest (free) Adobe DNG Converter, and convert your ARW files to DNG - then you can import them in Lr4.