Hi, if you install the plugin with the setup program (selecting the "render node" option), it's not necessary to put the textures in a shared folder, because each node has its own local copy in "c:\program files (x86)\itoo software\forest pack pro".
Futhermore, the first time that a render node uses Forest, these map folders are added to the user paths (defined in Customize->Configure User Paths->External files). You can verify it checking the 3dsmax.ini in render nodes:
C:\Users\<user name>\AppData\Local\Autodesk\3dsmax\<max version>\3dsmax.ini (see the [BitmapDirs] section)
So, it everything works as intended, you don't need to do any special procedure (not even fixing paths in the Asset Tracker), because Max will locate all textures in the User Paths automatically.