Having an issue with the latest client version

Using both the specified USB dvices and encryption which is now available in this version and the excryption seems to cause issues on the client.

If I copy a 150KB file it can sometimes take up to 2 mins to copy it to the device and encrypt it. If i copy larger files say a PDF thats 4MB it starts the encrypt before the file has finished copying and causes the copy to stop.

8/10 this will lock the client and you can no longer use the USB device or encrypt any more files till you reboot the PC - have left it for an hour now all for a 4MB file???