How to migrate preferences after new install

After installing SPlat, the first time I opened it I was asked if I wanted to migrate preferences from a previous version of SONAR. I wanted to, but I suspect that when in the dialog box I double-clicked on the version I wanted (rather than select and then click 'OK'), I somehow bypassed this step. Question: Is there anyway I can now migrate those preferences from X3e to SPlat, or is that chance gone forever?