There have been a lot of upgrades the last few months and as many of you know when you upgrade you lose your custom materials and also your presets.
The problem with the way it is currently setup is that this data is being stored in sub-folders within the plugin folder. When you uninstall the plugin the Extension Manager will blow away the entire plugin folder and also all of the custom data within your sub-folders.
Currently to maintain your custom library copy the sub-folder “library_mats” in its entirety to some other location on your computer. Once you’ve installed the updated version then copy your library_mats folder back into the plugin folder overwriting the default library_mats sub-folder installed by the Extension Manager. This will restore all of your saved custom materials and associated JPEG and PNG images.
This same method can also be employed for your wall presets, by copying the “preset” sub-folder and restoring it after an upgrade.
Please feel free to contact me directly via email or phone if you have further questions on this matter.