Backup / Restore Button is Gone !!

I’ve been using Memory Zone on my Acer Iconia Android 4.2 tablet since January 2014.  It has worked fine.  I opened it yesterday and the “Backup / Restore” button was MIssing from the screen!  Internal Memory & Memory Card are showing along with the Online Storage BUT the Backup / Restore is Gone and there is a tab in that spot with “OptiMem” showing.  A option to automatically free up internal memory by moving data from Internal memory to the SD card (pictures, etc).  I uninstalled Memory Zone and reinstalled it from Google Play, but still have the same problem. 

I primarily used to program to backup files to Google Drive.  Anyone have an answer as to why it’s now gone and/or how can I get it back?