I would not use the paper tests, no.
Certainly, I would not use them as practice tests, because they work completely differently from the computer adaptive test format that is now used.
They could be useful as simple problem sets, but the
newest paper test is from 1997. There are many other sources of more recent official problems - I would use those.
There are three official guide books that together contain approximately 1,500 problems. The GMATPrep software contains 90 free problems and you can buy another 400. So that's a total of about 2,000 problems.
If you have actually done most or all of those but don't yet have the score you want, then your issue is not that you need more new practice practices. Your problem is that you're not studying in the right way - so better to learn how to study well / learn what you need and then go over those same problems again.
Read these two articles:
https://www.manhattangmat.com/blog/inde ... lly-tests/http://www.manhattangmat.com/blog/index ... -the-gmat/Do these reflect how you're studying and approaching this test? If not, what differences do you need to make in order to start studying in more effective ways?