I took the plunge and decided to upgrade my sero 7 pro to android 4.4 following philz guide. In Step 3, I have formatted ok and then proceeded to install the ROM, when I select install zip and select from /storage/sdcard1 then select sero7pro-aosp444-dopa-v2, nothing happens and I get a message at the bottom of the screen saying "no files found" but they are on the SD card. Has anyone a solution to this problem. I have tried different SD cards. I am a newbee. Many thanks.