Application Locking

My post relates to the Application Locking utility. I recently uninstalled the various CM Security apps on my phablet (CM was gradually taking over control of the device) and installed AMS instead. The Avast version of Application Locking is working fine, but I have a problem when entering the password. Naturally, I want to enter the password quickly, but I am continuously making mistakes because the numeric keypad boxes are so small. The CM Security version of application locking has large circular input buttons and was much more reliable for password entry. Can something similar be done to the Avast version please?

but I am continuously making mistakes because the numeric keypad boxes are so small.
Get a pair of decent glasses ;D