Exploding Text Blocks

Hi, I run another mapping program specific to my work as a tree surveyor. In this program for some reason, when I open a dxf file the un-exploded text is missing. If I open the same dxf in DraftSight the text is clearly visible. I have had someone use AutoCAD to explode the text and then re-save, this solves the issue and the text then appears in my tree mapping program. I have around 100 files to do this with, so quick and easy methods would be good.

My Question is:

                         Iif I know which layer the text is on, how do I select, explode, and then save the changes?

Thanks in advance!