After installing the old version Foxit Reader on Ubuntu, it always displays the following informations...

Before you start using ConnectPDF,please check the following settings.
Foxit Reader always display before you start using

Even though click"Don't show this message" , when next time I open Foxit Reader, it displays yet.
In fact, it has a another bug that can't save account information.

Solutions:

In terminal:

sudo /home/arron/opt/foxitreader/FoxitReader.sh

Replace /home/arron/opt/foxitreader/ with your installation path

In this time, you click "Don't show this message" , it effective.
At the same time, you can login, your changes still effective in next time you open Foxit Reader.