I have just tried N1MM Logger+ under Ubuntu 12.04 without success..
Try upgrading from 12.04 to 14.04 LTS (like I did last week). The person who got N1MM (he didn't try N1MM+) running did it under Linux Mint, which is a fork of Ubuntu.
About TLF, I don't find it in the Ubuntu repositories.What is its official website?
It used to be http://home.iae.nl/users/reinc/TLF-0.2.html
(that may be where the manual is) but I think the latest is at https://github.com/Tlf/tlf
. There might be several versions there on Github, including cutting-edge versions that the developers are playing with, or perhaps versions for specific contests.
If you upgrade to 14.04 LTS, tlf IS is in the repos, and therefore can be installed via Synaptic package manager. I didn't do it that way; I installed TLF from source (in ~/local/share/tlf) when I had Xubuntu 12.04 LTS.
By all means join the tlf-devel reflector (https://lists.nongnu.org/mailman/listinfo/tlf-devel
), or at least browse and search their archives at https://lists.gnu.org/archive/html/tlf-devel/
. The instructions I received to do what I did are there (search for w0btu).
Backup at least your home directory before you let Ubuntu upgrade it for you. I didn't have any issues, but there's always the possibility of losing your data.