Sometime last week while bored I was searching through the many apps and setting of my ubuntu system. I found a GUI option to set tmux (maybe tmx) as the default terminal, from what I remember? It turns out that tabs do not autofill, and it is missing many features that make it next to unusable for me. But I cannot find this option anywhere anymore to change it back. I have tried commandline options online for changing default terminal, but nothing is working. Opening xterm also just shows tmx.
Help is appreciated, because tab actually tabbing is getting on my nerves immensely.
EDIT:
the default terminal is already correct, its the fact that opening gnome-terminal, opens in tmux and is unusable. also tried reseting the settings as in How to reset the terminal properties and preferences? to no avail... Also looked through .bashrc and saw nothing. The preferences show no option for this either or my own system settings that I can find, but not a gnome-terminal specific problem since affects xterm.