I have been using another product (Intaglio for Macintosh) to produce vector graphics files and then export them as PDF files to distribute and send to a printer. This program does not work with macOS Big Sur, there is no updated version, and the company appears to have gone out of business. Can Illustrator or another Adobe product open and edit PDF files of this sort so I can edit (modify) the PDF files I have saved from this other program?