7-Zip doesn't have any issue unzipping the apk. Beside it a different zip file. Linux apk (zip).
I'm still learning new things on the Android. Like push, pull and other adb commands.
Can even backup the whole phone by using this command "adb backup -apk -shared -all -f C:\Users\NAME\backup.ab" and also restore your stuff on the phone by using this command "adb restore C:\Users\NAME\backup.ab" (Note: Doesn't work on some Android devises.)