upgraded modules relying on Matlab plugin
Made some important changes to the matlab plugin.
The matlab plugin relies on a temporary file, which is stored in the letswave4\temp folder.
In the previous version, the same filename was used. Therefore, when multiple processes relying on the plugin were used at the same time, his caused an error because the different processes were relying on the same temporary file.
The problem has been fixed. Now, the plugin creates a unique file for each process, which is erased once the plugin does not need it anymore.