If you installed version 11 or we and would like to have all the old arrows and callouts that were available in version 10, we now have a way to install those old styles.
Attached to this article is an EXE file that you will need to download. Before running the EXE, be sure that Snagit is closed all the way down (even from task manager > processes tab). Once Snagit is completely closed you can run the EXE file. Then open Snagit and all the arrows and callouts from version 10 will be available for you.