Signature not recognized after device firmware upgrade

I am not able to log in using my signature on my samsung galaxy S3. I had done a firmware upgrade to Jelly Bean (4.1.1). I have tried signature several times. But did not suceed and I am afraid I need some data urgently.

Could you suggest an alternate way. I have only signature encryption. Can I back up the data if I want to try reinstalling Biowallet? I dont want it to be lost.

Please consider this as high priority.

Thanks