Hello! Unfortunately, without knowing the specific program you're referring to and the format of the .sig files it generates, I can't provide a definitive answer. Generally, .sig files are associated with email signatures, but they can also be used by various programs for different purposes.
To convert .sig files to .pdf, you'll need to find a suitable program or method that can open and print the .sig files to a PDF printer or converter. Here are a few steps you can take to try and accomplish this:
Try opening the file with different programs: Even though the original program may not be available, try opening the .sig files with various text editors, image viewers, or other relevant applications to see if any of them can interpret the content or provide a print option.
Use online conversion tools: There are online services that claim to convert various file formats to PDF. You can try uploading your .sig file to one of these services and see if it can generate a PDF version for you.