How to replace 120.4.1 to 121.0 on Linux Ubuntu?

[kikopb]

1 - I am currently playing with version 120.4.1 on my linux ubuntu, but I have no idea how to update it to 121.0 without losing my settings and maps.

2 - In addition, I try to click or start from the terminal on the "simutrans" file and it simply does not open or is it some other way to open the file?

[Roboron]

How did you install Simutrans?

If you installed it via Ubuntu repositories, I think version 121 is not yet available. You can use the independent repository to have more up-to-date Simutrans and paksets https://simutrans-germany.com/wiki/wiki/en_Simutrans_repo_deb