I make python scripts and put them on the shelf. At some point, the word <unefined> appears in their place and the path changes. For example, instead of C:/Users/Danil/Documents/houdini18.0/toolbar/default.shelf, the line C:/Users/Danil/Documents/houdini18.0/SideFXLabs/391 (local) /toolbar/default.shelf appears. No matter how carefully I act, wherever the scripts are stored, this still happens. And the shelves are not stored to. Each run of a Houdini has to be reloaded.