Flashtool is already prepared for this case!
So we can try it directly. Download latest!!!!! Flashtool (version 2.9.1) and download the chargemon.zip from my attachment.
Unzip the file and copy it into flashtool folder:
overwrite the original chargemon file!
Now open flashtool and and click "Ask Root Permissions", if that had worked you will see that the "xRecovery" Button on the right side gets activated.
Push it now!
When flashtool says -> Recovery installed.
You can reboot the device -> Now push the back button on the device during the booting process. If all works you will be in Recovery