c74/max/Menu/Options/File Preferences
File Preferences...
- Note, this IS present in Ableton/Max for Live
- Choose File Preferences... from the Options menu to show the File Preferences window.
- Click on the Add [+] button in the File Preferences window toolbar. A new line will appear in the File Preferences window.

- Click the Choose... button in the Path column and select a folder from the file dialog. The pathname of the folder will appear in the Path column and the folder will be added to your search path.