Thank you.
For #2 it was my typo - new MODULE and not mobile, absolutely.
The new user interface which allows to open recent files locally or from the acrobat online account. In some cases the performance is very bad, and while there could be value in having access to more recent files I don't see the interest of creating a new interface for this - what had been in place until now was perfect. The transition to some sort of new window doesn't seem justified, on the Mac for instance we like the list of recent files from the OS menu better.
The information you provide seems to be the way to get rid of the awful Fill and sign tab. Is there a way we can disable this new file list interface?
More generally I'm wondering why did Adobe do these changes? 11.0.7 was much better! Also it is very frustrated that some bugs we filed years ago have never been fixed, postponed from version to version and Adobe finds the time to add useless, ugly interfaces. This is very disappointing.
Thank you anyway, I will let you know where we are once I will have been able to experiment the registry keys you've provided.
Best,
Jean.