Hi. I am looking it to your options. I do fear you may have to end up reset your entire Acer Iconia's content (apps, data and settings) though. Do kindly stand-by.
Edit: Yes, if the default passcode/password 1111 will not work, then you will sadly have to perform a hard/factory reset to override the activated Quick Mode and get a chance to boot into normal mode. Yes the reset will erase all user data, apps and settings and restore the tablet to its factory defaults. Let us know the complete Acer Iconia model number you have and we will gladly advice as to how you can perform a factory reset with the current configurations.