I'm certainly not the most proficient at linux, but currently the beta launcher doesn't open properly in steam for me. I've reverified files, and made sure that my launch options are clear. The new launcher works if I run it directly from a terminal. Launching via steam results in a "starmade-launcher" program in memory with a size of 12MB, but nothing displayed and no other indications of it running besides steam picking up on it, and it being in the system monitor.