The RBF Manager now uses the latest WeightDriver solver from SHAPES, which includes a new kernel. However, I’ve noticed that the previous kernel performs better with the RBF Manager. I’m currently working on creating a custom branch of the solver using the old kernel and updating the RBF Manager to allow users to choose between solver versions.
as a temporal workaround you can get the old weightdriver from SHAPES – Blend Shape Editor for Autodesk Maya
Download the version 5.8 and replace the version in mGear with it.
WARNING: if you using the latest SHAPES, don’t do this, since the new SHAPES needs the latest solver.
If you have any questions, let me know here. I will try to help 
My apologies for the inconveniences