Protected View

Choose 'Enabled' and select 'Files from potentially unsafe locations' or 'All Files' to turn on protected view in order to protect your computers from being harmed by files originated from potentially unsafe locations.

Choose 'Enabled' and select 'Off' to turn off protected view.

This will change the setting in Preferences > Security > Protected View.

Settings:

0. Off
   

   Registry Hive	HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
   Registry Path	Software\Policies\Foxit\PDFReader\Preferences
   Value Name	ProtectedViewOpt
   Value Type	REG_DWORD
   Value	0

1. Files from potentially unsafe locations
   

   Registry Hive	HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
   Registry Path	Software\Policies\Foxit\PDFReader\Preferences
   Value Name	ProtectedViewOpt
   Value Type	REG_DWORD
   Value	1

2. All Files
   

   Registry Hive	HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
   Registry Path	Software\Policies\Foxit\PDFReader\Preferences
   Value Name	ProtectedViewOpt
   Value Type	REG_DWORD
   Value	2