Hi @Mateusz
Ok we will need to release a new version because I can scan QR codes with self signed cert if I add the CA certificate in the phone with the latest develop apk.
In order to avoid waiting two times the Google Play store approval, we will finish tomorrow the validation of the Edit Create Delete.
So most likely by the end of the week you will have the possiblity to use the app with self sign certificate and fully CreateReadUpdateDelete passwords 
Thx for your help debugging the apps guys you are amazing 