Windows 10 No Default Mail Client for paperport

[narinesa]

PaperPort pro 14.5 stop working with a message that there is no mail client found.
I tried many fixes but nothing seems to work.
I have also repaired office
I am using gmail, msn and yahoo.
My default mail client is outlook 2016
Outlook is x64
Paperport is x86

 

[narinesa]

Problem Solved in regedit:
HKEY_CURRENT_USER\software\scansoft\paperport\paperport user preference
BrowserSelect
Modify "Mozilla Firefox"
to
"none"

File, exit regedit