diff --git a/README.md b/README.md
index df5fe65..337240c 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,14 @@
 # Usage Instructions
  * Plug HDMI into Beamer
  * Plug USB into Computer
- * booting the Raspberry takes approximately ?? seconds. the ?? led will light up when ready
+ * booting the Raspberry takes approximately ?? seconds. the green led will light up when ready
  * start freeze.exe from the (now attached) USB-Drive
  * press WindowsKey+Y or Alt+PRINTSCREEN to take a screenshot
  * simply unplug after use
 
+## Other features
+ * you can call freeze.exe with the cmdline argument "single" to just do one screenshot, save it and exit
+
 # Initial setup
 
 ## Parts
@@ -17,7 +20,7 @@
 
 ## Hardware
            LED     LED SW
-     _______|_______|_|____
+     ______||_______|||____
     | :::::::::::::::::::: |
     |                      |
     |_HDMI________USB__PWR_|
diff --git a/raspberry-environment/display.py b/raspberry-environment/display.py
index 3a8af7a..9d89154 100644
--- a/raspberry-environment/display.py
+++ b/raspberry-environment/display.py
@@ -13,8 +13,8 @@ import time
 import subprocess
 import glob
 
-pin_led_ready=27
-pin_led_busy=5
+pin_led_ready=12 # 27
+pin_led_busy=18  #  5
 pin_switch=13
 
 try:
diff --git a/windows-snapshot-tool/bin/freeze.exe b/windows-snapshot-tool/bin/freeze.exe
index 3f4bd51..cd783df 100755
Binary files a/windows-snapshot-tool/bin/freeze.exe and b/windows-snapshot-tool/bin/freeze.exe differ