office365 - Why does my Mail App for Office show in Outlook online but not in my installed Outlook Client? -

i have developed mail app office.

it showing in office 365 outlook in browser not in installed client.

on web

but in installed client looks this. ie app not showing:

in client

i have looked @ managing apps etc can't find settings force show in installed client.

any ideas?

here manifest:

manfest

please note, not real app more of "trying things out" app.

ok here version of office: enter image description here

and here updated manifest file @andrews requested remove regex rules simplify trouble shooting:

enter image description here

i un-installed app, restarted , still cant see in outlook desktop client.

thanks russ

your manifest version 1.1, outlook build not 2013 sp1. outlook 2013 sp1 builds 15.0.4569 , higher. please update outlook client, , app appear!

UIO