When you want to save your work simply use theor menu items. Save will save the file in place and Save As will ask you to specify a place where to save the file to leaving the original unchanged.
Power Prompter can save files as .ppr, .txt, .rtf and .docx files.
.ppr files are Power Prompter's native document format and should be used whenever possible.
Power Prompter doesn't have an auto-save feature. So you should manually save your work from time to time. We decided against adding auto save because in collaborative settings unwanted changes might be written to a shared document otherwise.
It's up to you to decide when to commit the changes you made.