Good advice! Checked it, works.
There are still some limitations:
- File Tools can open only up to 100 selected files, if there are more - only the first one is in the list. (Folder context menu opens all the files, even 1000, tested).
- Merge tool silently falls on the big list. The deeper in subfolders/longer names - the shorter list can be handled.
Anyway, best software for pdf merging as for me.
And the other tools are at high level of quality too.
Recommended to friends.