Since with r125 the old geometry was abolished, I created an updated version of the addon.
Starting from revision 90 I also replaced .addAttribute with .setAttribute and .setDynamic( true ) with .setUsage( THREE.DynamicDrawUsage ) .
Also the old versions are still on Github. GitHub - hofk/THREEf.js: three.js addon, to produce almost infinite many time-varying geometries / buffer geometries with functions (cylindrical coordinates)
The sandbox THREEf geometries r136 starts with the new version.
The button (>>> to old Geometry) leads to the old version.
Some examples have been changed to BufferGeometry for the new version.