Typically, new SoFi version are announed in our mailing list and can be downloaded in the download section. Easiest way to update your experiment(s) to the newest SoFi version is to:
1. save and close all SoFi Igor experiments.
2. download the newest SoFi.ipf and replace the current SoFi.ipf file.
3. open your SoFi Igor experiments. SoFi automatically updates once you press any button or tab.
Newer SoFi version may also include the version number. In this case, either it should be renamed to replace the currently loaded SoFi procedure file to follow the process described above or the current SoFi procedure can be closed under SoFi -> close SoFi standard procedure so that the new version can be loaded (e.g. by drag-and-drop into the experiment). The latter process has to be repeated for all experiments while the approach described first will update SoFi in all experiments that are opened afterwards.
Please keep in mind that the name of the SoFi_key.ipf should not be changed. Otherwise SoFi cannot read the license key.