diff --git a/.gitignore b/.gitignore
index 74af85d..a0e279c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,9 +3,11 @@
 ########################################
 *.o
 *.swp
+*.swo
 *.bin
 *.bak
 *.smc
+*.dropbox.attr
 
 # ignore shared files that have been copied to host-firmware dirs
 firmware/source/shared_*.h
diff --git a/Readme.txt b/Readme.txt
index f3ee921..78a8e47 100644
--- a/Readme.txt
+++ b/Readme.txt
@@ -16,13 +16,13 @@ run:
 ./inlretro
 
 
-FIRMWARE:
+AVR FIRMWARE:
 install avr-gcc and avr-libc:
 sudo apt-get install gcc-avr
 sudo apt-get install avr-libc
 
 
-BOOTLOADER:
+AVR BOOTLOADER:
 bootloadHID-master:
 https://github.com/ajd4096/bootloadHID
 fork of original obdev bootloader has option to remove BL switch with timeout.
@@ -57,6 +57,9 @@ Uploading 1920 (0x780) bytes starting at 0 (0x0)
 -take BL switch back to RUN
 -enjoy new firmware
 
+STM32 FIRMWARE:
+Need arm-none-eabi-gcc
+
 
 ===================
 Windows
@@ -71,6 +74,7 @@ Install minGW:
 		(primary need is make, basic unix commands are nice to have)
 	optional: msys-openssh 
 		(helpful if using gitlab to pull updates)
+		lua for host app dev
 	minGW utilities can be easily added or removed at any time with minGW installation manager.
 	Add C:\MinGW\bin & C:\MinGW\msys\1.0\bin to your PC's enviroment PATH variable
 		-control panel search: "edit system environment variables
@@ -95,7 +99,7 @@ But whatever it works and saves ~12sec of compile time with current setup.
 This way lua is compiled separately using it's provided make file.
 make clean still deletes lua object files, so this process must be reperformed if cleaned.
 
-FIRMWARE:
+AVR FIRMWARE:
 Download and Install WinAVR
 http://www.webring.org/l/rd?ring=avr;id=59;url=http%3A%2F%2Fwinavr%2Esourceforge%2Enet%2Findex%2Ehtml  
 	optional: install programmer's notepad has handy feature to make clean, all, program in tools menu
@@ -113,7 +117,7 @@ Place BL/RUN switch in BL, then hit reset button in INL retro-prog
 from firmware folder run command "make program" this will flash target build onto device using bootloadHID.exe
 Take BL/RUN switch back to RUN and device will reset into INL retro-prog you just built.
 
-BOOTLOADER:
+AVR BOOTLOADER:
 If you wish to build bootloader for kazzo (shouldn't be necessary for most ppl) follow the following
 Requires you to have an avr programmer to reflash atmega164a mcu
 Helpful to download more recent version of avrdude than included with WinAVR.
@@ -133,3 +137,10 @@ If trying to flash mcu from make file you'll have to modify AVRDUDE line to matc
 Once completed you can make the bootloader and flash it with command "make flash"
 
 
+STM32 FIRMWARE:
+
+Need arm-none-eabi-gcc:
+	https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads
+
+Download .zip file and place in folder like C:\ARM and create environment variables to point to bin folder
+
diff --git a/host/inlretro.exe b/host/inlretro.exe
index 100294c..1ba2612 100644
Binary files a/host/inlretro.exe and b/host/inlretro.exe differ
diff --git a/host/source/usb_operations.c b/host/source/usb_operations.c
index c19fdda..d5d1da4 100644
--- a/host/source/usb_operations.c
+++ b/host/source/usb_operations.c
@@ -101,12 +101,13 @@ libusb_device_handle * open_usb_device( libusb_context *context, int log_level )
 		if (log_level>0) printf("checking %x product\n", desc.idProduct);
 		if ((desc.idVendor == 0x16C0) && (desc.idProduct == 0x05DC)) {
 			//Found a V-USB device with default VID/PID now see if it's actually a kazzo
+			//printf("found matching VID PID pair\n");
 			if (log_level>0) printf("found vend ID:%x prod ID:%x ", desc.idVendor, desc.idProduct);
 			if (log_level>0) printf("manf: %d prod: %d\n", desc.iManufacturer, desc.iProduct);
 
 			//opening device allows performing I/O via USB with device
 			rv = libusb_open( device, &handle );
-			check( rv == LIBUSB_SUCCESS, "Unable to open USB device: %s", libusb_strerror(rv));
+			check( rv == LIBUSB_SUCCESS, "Unable to open USB device: %s., \n\nDEVICE FOUND, BUT CAN'T OPEN DEVICE, VERIFY DRIVERS ARE INSTALLED!!!", libusb_strerror(rv));
 			if (log_level>0) printf("device opened successfully\n");
 
 			if (desc.iManufacturer) {