Rouvie, please try these steps and let us know if any resolve your issue...
First, let's try deleting your slimerancher.prf file to ensure your settings can be reset entirely. This will also reset any achievements so you know.
Using ubuntu you should be able to find it here:
~/.config/unity3d/Monomi Park/Slime Rancher/slimerancher.prf
Now, restart and try running slime rancher again.
If it's still not working, please try running again in
safe mode, click here to learn how.
Let us know how you make out.