Jess's Math Plug-in Out of Topic

Apologies for this out of topic question.

Just installed Jess's Math plugin on a computer with 64 bit Windows 7 operating system.  Whenever I pick a surface or curve from the library I end up getting the same one regardless of which I pick (mobeus strip or the helical curve)

Otherwise everything appears to be  working providing I manually modify the equation within the table.

Many thanks

William