When you first launch Memento Composite, it will ask you where you would like to save your work, suggesting a location under your Documents folder.
Should you start to create projects, portrait templates and other presets using this default location, your work will save to this location.
If you decide to change the default location for saving projects and presets under the General options...
then your existing presets will no longer be available when you next launch the software.
To migrate your presets, open your file explorer, and locate the Presets folder.
Copy the contents of this folder to the new default location. Relaunch Memento Composite to complete the transfer.