hello!

I have some questions about the gear plugin:

1) I cannot adjust the height of the teeth
2) I cannot adjust the shape of the teeth (to be round, triangular, square, rectangular, etc)

is there a solution for this?

You have now started three topics to ask the same question. That is very poor forum etiquette.

I have already provided a step-by-step answer for creating the type of custom shapes you want.
viewtopic.php?f=5&t=11734
Pleas do not post another question about this without providing an image of the results of your efforts.