After first session with debug extension with changing some debug options I am not able to build my project anymore.

Visual Studio reports:
Compiling 'BN_EthernetServer' for 'Arduino Mega 2560 or Mega ADK'
core.a(main.cpp.o)* : : In function `main':
main.cpp : undefined reference to `loop'
avr-objcopy* : : N_EthernetServer.elf': No such file
avr-objcopy* : : N_EthernetServer.elf': No such file
Couldn't determine program size:

Same with the Arduino-IDE, it stops with error

core.a(main.cpp.o): In function `main':
D:\Programme\arduino\hardware\arduino\cores\arduino/main.cpp:15: undefined reference to `loop'

This is what I tested: 
rebuild/cleaning project map
cleaning the files in users/.../vmicro
uninstall debug extension(not installed yet)
uninstall and reinstall vmicro-plugin
deleting all files in my project exept the source-files and build a new project-map
renaming the sources and build a new sketch/project
serching and deleting any arduino temp files 

Windows 8, Arduino IDE 1.04, Visual Studio 2012, newest stable vmicro plugins