Terragen 2 closes after showing function load error

Hello there,
When I want to open Terragen 2 this error appears on my desktop and if I click OK the program is closing. If I open the program again this errors appear again. Last week was the last time when I used the program and it worked just fine. Can anyone help me to fix this ?
Thanks !

Terragen 2
trLoadPlugin: C:Program FilesPlanetsideSotwareTerragen 2 Free EditionTGPGuiLoader/tgp
Cannot Locate function: ?trPluginStartup@@YAJPAVtrPluginStartupInfo@@@Z
OK
