On MyVoipTiger you select PBX and then Call Recording from the menu at the top of the page and you will arrive on an overview page of your added call recording. If this is the first time you are logging into MyVoipTiger, no call recordings will be shown.
To modify an existing call recording, go to the line for the call recording in question on the overview page and click on the icon of the wrench at the end of that line. Next, you will have the possibility to modify the name of the call recording and the SIP accounts it applies to. When you are finished, click on Save and you are automatically returned to the overview page of your call recordings.