http://www.anypassword.com/pro/
Run regedit as the user it’s installed as. Then go to
HKEY_CURRENT_USER\Software\Any Password Pro
This is where you can control it’s display. Make a note of the value in Alpha (it will show it in HEX but the value in brackets is in decimal).
Change the decimal to 255
Load AnyPassWord Pro and it should be back to normal.
Working values below (ignore the English missing a bit of the E. That was from rubbing out the key.)