Assuming you are using the latest version of the ‘Multiple Signatures’ applet, there are two ways to change the default path:
1) Execute the applet. When the signature selection dialog appears, press the ‘Settings’ button. Select the desired location.
1) If you are using Formativ Admin or Developer, open the applet in the editor and locate the constant called ‘OVERRIDE_PATH’ at the top of the source code. This constant will be set to an empty string. Enter the full path of the location of your signatures.
I hope this helps.