Hello, Herve:

Which Beta version were you using?

I noted difficulties with saving files in Version 1.0 format with earlier betas of the 2.0 software. However, I believe it has been fixed in later versions.

I just did a quick test with Version 1.9.6a and was able to save a file in Version 1.0 format and load it up in Version 1.1.7.

Regarding copy-paste: are you aware that copying notes requires a Control-drag, not just dragging? That is, hold down the Control key while holding the right mouse button and dragging. Version 1.9.6a seems to work correctly in that regard.

Hope this helps.

David