Targa files used to save paths, but I can't get it to work now.

Question

I've been using targa files to provide my marketing team with images that work in their space planning program that include transparency. I use an alpha channel to do this, and that part remains in fine working order. However, I used to save these targas on our network drive and they would retain paths we had created so we could easily select different parts of products and change the color for proposals the marketing team wanted to do.
It's been a little while since this functionality has stopped working for me, and I can't for the life of me figure out why.
They take substantial resizing after the fact, so just generating them from the PSD file every time is not an option. We still need the full size images from time to time anyway, and I'm talking about thousands of images. The size it would take on our network would make IT BM in their collective pants.
Edit: I suppose I should say that I recently upgraded to CC, but I've been having this problem before then with CS5 as well. On a Mac, running Mavericks.

Answer 1

I appreciate the reply. It's unfortunately not helpful for this problem.
The sheer number of images we end up having to edit makes working on PSDs prohibitive, so we start and finish new versions of the products using only the TGA files. These files don't retain any of the channels created by masks in the PSD.
When we have a product that has only one possible color, selecting the channel that we use for transparency works to grab the item for color correcting, but often times there are multiple parts to the product (wheels, handles, etc.) that need to be selected individually to create the color combinations marketing needs.
I suggested to my coworkers that we could create channels for all the different features, but without testing to make sure this doesn't break the functionality in the space planning program, it's not something we want to try.