Seawolf The problem is not the mod or its code after all it did work before until the recent updates. So something changed in the game since 0.14.6. And now my test ship from two years ago even crashes on unpausing due to some pathfinding error. I believe it's due to the new crew features. I've no idea where to start looking for it let alone fix this pathfinding error. Right now Cosmoteer is very buggy for mods, and frankly, in order to promote and give vanilla incentives for next year's release debugging mod only used features is very low priority. Anyhow, I just tested the related weapons with DeathByTargetProximity and nothing happened. So I can't really tell whether the problem is really gone or because the test conditions are different.
Make sure you downloaded the right versions for either 0.15.0 or 0.15.1.
Edit: If it still crashes for you try this http://www.mediafire.com/file/wf3jx3ely9qmvxa/Abh069%255B0151%255Dtrial_deathbyproximity.zip/file and replace the files in the ammo_shots
folder. They are technically the same except I just revert the use of references for a copy of the same code.