StarTools keeps a detailed log of what modules and parameters you used. This log file is located in the same folder as the StarTools executable and is named StarTools.log.
As of the 1.4 beta versions, this log also includes the mask you used, encoded in base64 format. See the documentation on masks on how to easily decode the base64 if needed.
The Heal module was created to provide a means of substituting unwanted pixels in an neutral way.
Please note that most datasets will need to be converted to an uncompressed TIFF format.
You can convert everything you see to a format you find convenient. Give it a try!