I'm running Windows 7 64-bit.
In 0.4.14 and 0.4.15 the projext exportation doesn't mind some controllers. This is true both for normal controllers or Peak controllers.
Controller data are saved in the project file, but the program seems to forget them when exporting: after having exported (both wav and ogg) I tried to play the project from the programs, and controllers are not working.
Note: this mostly happens with Zyn plugin.