Likely they are temporary files that were somehow orphaned. I'm pretty sure they are completely safe to delete. If you are hinky about it, I'd say that you should create a folder and stash them there until you are certain nothing bad will happen.
Thank you for the response. I'm curious about those file types.
In a related question, is it ok to delete the files Named "SnippetPreview1$.htm" from the list of files. The reason I am interested in removing these files is that I have Perforce to contend with when checking in/out files and I would like to ignore these files in my check in. Each time I generate and publish the document, several files are updated or created that gives me a tedious check in with Perforce.
Thanks, in advance, for the assistance and answers.
Please see Re: Unnecessary files are created in RoboHelp HTML project regarding your original question.
I can't say for sure that the "preview" files can be deleted but I would be surprised if they cannot as the name suggests they are created when you preview Snippets.
Are they listed in the Unused Files Report?
I would back up the project and then delete them but that is your call.
See www.grainge.org for RoboHelp and Authoring information