(calderaforms) Export excel fixing

Hi,
I use calderaforms,when i try to export entries to excel file, results in excel file come like this:

???μ?¨asdas”,……..???§,,”…… ?3?????… ?§?????-?????? ???§?-???§”,,,,”ewrwer

However, i use another form plugin which it is ok, no problem with it.

How to fix it.

Regards