TruSeq Exome Kit bed file old version I have to run an analysis using Whole Exome Sequencing (WXS) data prepared with the TruSeq Exome Kit (2012).

I need the .bed file for the kit and I found it here.

However, this file was posted on Nov. 16, 2015, while the kit used in my case is from 2012. I searched but I didn't find the bedfile for that specific version online.

Will I run into problems if I use this version, and in this case, where can I retrieve the bedfile for 2012's version?
Usually it is more problematic to work with older versions of data with newer protocols than the other way around.

In this case, I think that the features annotated in the (newer) bed file should be more accurate than the older one. Unless you specifically want to compare your experiment with a previous experiment performed with a bed file from 2012 you'll be fine using the newer one. 

However make sure that you are correctly using the right file and that you report (or record) each version of protocol and data used in case some doubts arise.