Maybe it can help other users...
My project / template loads without crashing, now !

It was my mastering chain that made troubles. It was 1 multifx + another one inside the first. I deleted them, then put the 2 multifx in serial on the project window with the same fx processors in the chain. Now, it loads perfectly ! I'm very happy !
And now, I can say that 7.0 is much more stable, loads / exit faster, nice little correction : more than 6 "recent" files in the file menu.
Apparently, S|C is working hard for STS to work fine on 64bit os, which means certainly also all modules working with wav files ! We should have the update soon. They find back what soon means for the rest of the world...
I think we can talk about a real rebirth ! 
Let's hope everything will going fine in the future.
Now, they need to COMMUNICATE ! Like adding some 7.0 presentation video on Scope Zone + several video tutorials about Scope basics : I'm afraid that now, all audio computer stuff are doing like that and all audio computer stuff users expect to watch them on the official site.
I know, I know, it takes time and it's better for S|C to spend time on development... But see
Falcon UVI tutorial videos, they are not made by UVI... I guess UVI paid professionnals to produce them and the result is really good / pro / serious / makes you want to try / helps beginners to learn faster / etc...
I know, I know, paying pros is hard for S|C : They don't have a lot of money... But one should see that like a short-term (& long-term too !) investment : they will necessarily sell more hardware units & softwares (short-term) + become more known (long-term).