Ohhh.. can not believe you still did not start reading ALL configs simply...!
There is a main folder of TC and a config to read at the bottom what is set as file extension... simple, isn't it?
Please start reading and using the settings to get it changed.
Setting to config.ini... or .bc...
Its simple reading and basic logic... and a liiitle dilligence.
How to help if people are that ... whatever..