You said you're working with T18.104.22.1688/439, in which case your TMs wouldn't be compatible with earlier versions.
Since I work with exports, I don't really have any problems with older Trados TMs. The export files can be imported into new TMs, no matter the Trados version used.
So, I guess it would be wise to keep the older Trados version in case some client is still working with Trados 6 or previous versions.
I've read this many times, but frankly, I fail to see the wisdom in keeping several outdated versions just because someone might still be using them.
Ok.... I will have your opinion in mind. I guess I have to have a better look on what my clients are using and see the best way for both parties.
Since I don't need to have the older version of Trados on the new machine before upgrading it (that's great!), I can install the upgrade on the new machine (using a softkey) and keep Trados 6.5.5 (with paralel port) undisturbed on the older machine for the time being. Correct?
You can do that, of course.
Great... If I really have to keep both, off course.
Trados 7 is so new, I guess it's better to keep the older version in case something goes wrong...
You could always roll back to T6.5.5 (which is covered by the soft license).
Really? Didn't know that...
As for TMs... yes, having two different versions of TMs might be strange and confusing. But I do keep all memories safe in txt format (ready for importing if needed), so I guess it wouldn't be a problem. Having the two versions working on different machines I can easily swap if I encounter difficulties in Trados 7.
Exchanging data between your own computers using text export/import is cumbersome, compared to simply replicating the databases. But it's possible, of course.
Thanks Ralf. I really appreciate your assistance. It has helped me a lot. Everything looks clearer now... At least until Trados releases a newer version again