Problems with Keys-To-Go 2

Hi all,

I recently bought Keys-To-Go 2 keyoard and I felt in love with it. Unfortunately I started to encounter problems: while typing sometimes there is some kind of a glitch and keys are pressed/send to device multiple times. For example when I start to write "Apple" it glitches and writes "Appleeeeeeeeeeeeeeeee".

It's not a problem with specific keys and it happens on different devices. It makes the keyboard unusable at the moment.

Did anyone encounter anything like it?

The biggest problem is that i lost the purchase receipt :( I hope it's something that I can repair on my own or it's some kind of a firmware bug that I can change with the new firmware.

EDIT: after sending it to the service it started working correctly. They said the updated the software.