Thanks liok Ok did some experiments and here is how the presets save/load functions, for anyone interested in not loosing days of customization: - Save presets exports ONLY the current tab, both surface and voxels presets. - Load presets imports the file inside the CURRENT tab, not in the tab you exported from. So to manage tool presets, the only way is to Save each Tab individually and naming the saved file WITH THE NAME OF THE TAB, then each time you install a new version, Delete a