The next time you have a CTD or error of any kind DO NOT restart HW. Post the first 12 and last 12 lines of the HwRM log file so the dev can look at it. It is a text file and is named "HwRM". Also, to actually get the log, you must use the command line -luatrace in the command window under the mod selection before you start the mod.

The log file location
C:\Program Files (x86)\Steam\steamapps\common\Homeworld\HomeworldRM\Bin\Release

It could be an error from Steam, when it copies the mod to its installation folder it can get corrupted.

There is also a Divide by Zero bug that GBX must resolve because it is crashing many mods and could be the reason why you are having difficulties. This is on GBX's end and we are waiting on them for a response.