Windows Registry Editor Version 5.00

; Changes to make TB Portable the default e-mail client
; Make your TB Portable the default mail client: Tools > Options. Don’t skip this step.
; Edit YOUR ThunderbirdPortable.exe path below. MINE is E:\\Program Files\\ThunderbirdPortable\\ThunderbirdPortable.exe
; Run this patch and you are done.

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Mozilla Thunderbird\shell\open\command]
@="\"Z:\\Apps\\PortableThunderbird\\PortableThunderbird.exe\" -mail"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Mozilla Thunderbird\shell\properties]
@="Thunderbird &Options"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Mozilla Thunderbird\shell\properties\command]
@="\"Z:\\Apps\\PortableThunderbird\\PortableThunderbird.exe\" -options"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mailto\DefaultIcon]
@="Z:\\Apps\\PortableThunderbird\\App\\thunderbird\\thunderbird.exe,0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\mailto\shell\open\command]
@="\"Z:\\Apps\\PortableThunderbird\\PortableThunderbird.exe\" \"%1\""

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail]
@="Mozilla Thunderbird"

; This fixes MAPI

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{29F458BE-8866-11D5-A3DD-00B0D0F3BAA7}\LocalServer32]
@="Z:\\Apps\\PortableThunderbird\\PortableThunderbird.exe /MAPIStartUp"