Create Ubuntu unity Launcher for the wine program irfanview

Irfanview was installed using the winetricks program, which requires to load an older version 4.33 found on oldapps.com
Then I created a launcher called  "irfanview.desktop" :

[Desktop Entry]
Type=Application
Name=Irfanview Program Loader
Exec=wine /home/paul/.local/share/wineprefixes/irfanview/drive_c/Program\ Files\ \(x86\)/IrfanView/i_view32.exe
MimeType=application/x-ms-dos-executable;application/x-msi;application/x-ms-shortcut;
Icon=/home/paul/.local/share/applications/irfanview.png
NoDisplay=true
StartupNotify=true

This launcher is a .desktop file based on an askubuntu answer which starts by suggesting to copy an existing .desktop file from :

ls /usr/share/applications/*.desktop

I copied the wine launcher.
I changed the image based on this Ubuntu Handbook post.

Right click menu "open with"

It's also possible to edit context menus. I tried editing: "/home/paul/.local/share/applications/wine-extension-jpe.desktop"

I replaced the line starting with Exec by the following:

Exec=env WINEPREFIX="/home/paul/.local/share/wineprefixes/irfanview" wine start /ProgIDOpen IrfanView %f

I adapted the exec command from this message.
Now when I right click on a JPEG image, open with / Irfanview. Irfanview starts with the image open.

Associate as default application

May require to edit this file:

/usr/share/gnome/applications/defaults.list

 And this page recomments to add a mime type in the folder:

/usr/share/mimelnk/application/