I got the idea the licence would be downgraded because as I bought the upgrade from LSP version, I lost the options I got on the freelance version (like winalign and stagger), at least I got the feeling that it had been so.
IIRC the availability of S-Tagger depends on the LSP version ('LSP' vs. 'Power LSP'), but WinAlign should be part of both. Check your installation...
Now since I am using tradostags quite a lot, I have to consider either buying this option again(at about 500€ ) as well as the upgrade option at more than 175 € (LSP is always more expensive and I don't want to use trados workbench on word, it had caused me too much problems in the past and i don't count the times I ended up with twin2clean)or on the other side another trados freelance 7 that I could use for some cases and for others the LSP.
Again, there's a bit of a mix-up here - if you want to use both versions in parallel, you need a new FL license, not an upgrade. (Also, you cannot upgrade to Freelance from LSP...)
I can't have a soft licence, I have 2 computers and Trados told me the soft licence can be in my case only for one.
There's no all-purpose solution to this issue. If the two machines are networked (and assuming you're not working on them in parallel), you can use a soft license. If one of them is a notebook, you can even use it, but this depends on your situation.
Once again, I would suggest talking to Trados directly.