Edit: Ha never mind, I'm a doofus. MDP2 already has this as 'Sessions' under Tools → Session Manager.
I have broken my thesis up into multiple .md files to make it easier for my brain to handle. As MarkdownPad is now, to open those files in order I need to select the first file in the folder, shift-click the last file, and then drag it all in.
It would be great if, instead, I could save all of these files and the order they're opened in as a project, so that opening the project would load all of the files.