Correct spelling, explanation: the word reset consists of two elements the prefix re and the verb set. Re is a word-forming element meaning back to the original place. Set is a very old word, first known as settan and then in Middle English as setten. Both reset and set have irregular past simple and past participle forms. Therefore, no rule can be applied in this case. The form is unchanged, which means that we add no endings. Thus, reset is correct, whereas resetted is incorrect.

Definition of reset:
verb, if you reset something, you set it to the beginning again,
You need to reset your phone to use it again.
When you arrive in Paris, reset your watch to local time.

Phrases with reset:
a reset button – a switch on your equipment that is used to turn the device off and then on again when does not work,
Please click on the reset button to restore the initial state.
reset the bar – change the standards of quality that are required for something,
Some people constantly reset the bar to push themselves further although they are still unsatisfied.

Incorrect spelling, explanation: making the past simple or past participle forms, the rule says that the suffix ed is added to the base. However, reset is an irregular form and you cannot apply any rule in this case. The form is unchanged and it is the same as infinitive to reset. It clearly shows that resetted is incorrect form and only reset is errorless.

Incorrect spelling

Incorrect spelling