Try deleting /data/validity/template.db
In next release i'll add a credit page (or an "About" dialog), something like "Based on Alternative App Picker by usman farhat", excuse me again and thank you again.
There is a simpler solution to get es file explorer working, it simply needs "su" binary in /system/xbin/ (su path is hardcoded)
1) open a terminal emulator
2) then execute "su root"
3) then "which su" (to know where is your su binary)
4) copy s...