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Unfreezing Devices
Frozen devices cannot be edited. If you receive a frozen device from someone else that you'd like to edit, or you want to edit one of your own frozen devices, you'll need to unfreeze it first. To understand the unfreezing process, it helps to know what's in a frozen device.
By contrast, an unfrozen device contains only the main device patcher file. All the other files the device uses are expected to be somewhere in the Max search path.
The unfreezing process ensures that all files in the frozen device (other than the main patcher) exist in the search path. It is designed so that you will never lose data. If there are conflicts, you are forced to resolve them before you can unfreeze.
Rules for Unfreezing
Here is a description of what Max does during the unfreezing process.
Discarded Files folders are not in the search path. However, subfolders created when unfreezing devices are in the search path. When Max starts up, it looks for the Unfrozen Max Devices Folder, then adds any folders only one level below to the search path. This is different from the way the search path is typically constructed by recursively adding all subfolders of folders you have specified.