get more apps IQ ends in page not found?

You could go to apps.garmin.com and download IridiumWhere to your computer. Connect 66i to computer and manually drag file into 66i device on screen.

hmm, no idea how to download the file

it tells me open garmin express, this is open, the device is recognized, but nothing elese does happen.

how do you download the file from the website?

Go to the address provided above. In the search field enter "GPSMAP 66i" and IridiumWhere should be one of the apps provided. Select the app, and click "Download" button. It used to download to the computer, but now it asks whether I want the app to open Garmin Express.

You could try that, have your device connected before you do.

sure I have the device connected and set up in the garmin express

but this does not help, simply nothing happens

I installed also the 'blue' apps for the phone, connection is here, but no other function

if you manage to get this for 66i somehow, I am interested, as nothing else seems to function and the project seems to be abandoned

I just tried it and everything worked fine. You might try deleting Garmin Express, reboot your computer, and then download Garmin Express. Then try to get app again.

I did reinstall express, which did not help at first, but this time it was possible to install from the apps.garmin page

Great!