If Starting SMath Studio 0.95 on Windows7-64bit with .Net 4 an Message apears that says "Error while Loading a Third-Party-Program. Plugin deactivated. Index out of array bounds" (lit. translated) If you load an SMath-File you get the message that you need the plugin "Special Functions", which is not available at your system.

Using the Mono-Version of the Programm (at same machine and .net) all plugins are loaded correctly.

I'm using latest version of SMath Studio on Win7 64 and everything works great. Try to copy SpecialFunctions.dll from Mono version to the installation directory of SMath Studio on Windows - this should help.

Does not work an shows the same Message.

A complete uninstall and clean reinstallation helped me to get a working copy of Smath.
But all DLLs in the plugin directory were not outdated.