@cromiumlake

Well...I found a way, using file manager:
Enable "full access"
Enable "hidden files"

then go to:
home>phablet>.cache>ubtd.mzanetti>HubIncoming

The file are inside that folder
Not lost in the sapce, but well hidden in the space

@brispete

Hey Man... many thanks I had good luck

I tried the installers from this page:
https://github.com/ubports/ubports-installer/releases

I tried the windows exe on a windows 10 machine but it did not detect the fastboot, so it kept waiting

I tested the deb file:
On a 16 LTS machine... the developer mode worked well , but then got frozen on fastboot
On a 14.04 installation, I never got the accept message on the phone (developer mode)....however I placed the phone on fast boot manually and then all worked nicely

So now the UBport is up and running on the phone