For the issue that you need re install it each time it crashes, may I know the operating system of your computer?
What is the special situation the software will crash?
For the working area, it is true that mLaser does’t set a working area. While the working area of the Laserbot is 383mm×367mm. Before you start cut or engrave an image, you can click on “Preview engrave area” to make sure you can adjust the proper position.
Besides, here is the learn website listed all the instruction for Laserbot, pull down the page and you can find all the introduction for the mLaser software.