Any samples you set, are stored in the StarTools.log file and can be restored using the 'LoadPSFs' button.
In the StarTools.log file, you should find entries like these;
PSF samples used (8 PSF sample locations, BASE64 encoded)
VFMAAAgAOAQMA/oDEQHaAoEAIwNeAOQAUwDUAY8AbAI5AdMBMQGkAFAB
If you wish to restore the samples used, put the BASE64 string (starting with VFM... in the example) in a text file. Simply load the the file using the 'LoadPSFs' button.