Hi Bobby,
I'm sorry to hear that you're facing this issue. It seems that for some reason, paths to ForestPack's assets (such as the full.bmp Distribution Map) are missing or not properly mapped in your 3ds Max configuration. You can access the configuration by going to Customize - Configure User Paths - External files, and the relevant information is stored in the 3dsmax.ini file. By default, the .ini file is located here:
C:\Users\<yourUsername>\AppData\Local\Autodesk\3dsmax\<maxversion>\ENU\3dsmax.ini
You don't need to manually configure these paths. When ForestPack is loaded, it checks if the paths exist, and if not, it can add them automatically (a warning message will be displayed).
If you previously checked the Do not show this message again checkbox to disable the pop-up window, you can revert it to its default value (to show the pop-up) by setting checkTexturePaths = 1 in the forestpack.ini configuration file. By default, this file is located here:
C:\Users\<yourUsername>\AppData\Local\Autodesk\3dsMax\<maxversion>\ENU\en-US\plugcfg
I hope this helps.
Best regards,