TOAD Data Point 5.7 - no ScriptRunner?

I have a script I need to run in ScriptRunner. I last ran it about 6 mos ago using ScriptRunner. I've since upgraded to 5.7 (from an earlier 5.? release). TDP doesn't seem to be able to invoke ScriptRunner - as if it's not found. My usual way to invoke it is to find the dropdown to "Execute SQL Script in External App" having first selected the code I wish to run in the Editor window. The error I get is:

Error executing external command.
Please check the command and make sure it is valid

Is ScriptRunner deprecated w/ 5.7?