The 1.5 Rebellion beta was released this Friday, but it has a few bugs, and mods haven't been made for it. Version 1.041 was the version before the current 1.1, but there has never been a Rebellion version 1.4.

Those sound like Mod version numbers, not Rebellion numbers. Each mod is for a specific version of Rebellion, and each mod has its own version number so you know when the mod gets updates.

You should always ask the mod author in this case, but in general there's 3 main causes of mod crashes.

A. Crash while applying the mod - Likely a problem with mod installation. Either the mod is out of date, you do not have your mod order right with multiple mods involved, or there are mod specific instructions you need to follow.

B. Random crashes in Game - Usually this is from the game hitting the 2GB "Ram" limit, which since mods add more content, tends to affect them worse. Reducing your graphics settings, from say highest to high, should reduce the frequency of such random crashes.

C. Mod Error - If a mod crashes at almost exactly the same point after loading from an autosave, or when you do a specific action like using an ability, it is likely a bug in the mod itself and you should report this to the mod author.

Oh and i was thinking about my system, i do not think its the game itself as i have played a few matches with no mods and it runs fine

only when i add a thicker MOD does it crash like maelstrom so i will try the lower settings, i really dont need things looking super pretty as i am usually to far out to see the individual ships anyway