No, it is not possible from my finding. There is no way to disable recovery per file basis, unless you run LibreOffice from command line with
However, I found a workaround that is less a hassle.
In Ubuntu 14.04, the default file manager is Nautilus. Its context menu or right-click menu can be configured further by using Nautilus Actions.
The screenshot above was taken via Synaptic package manager (The appearance may vary for newer releases). By default, there may be no items listed in Nautilus Actions Configuration Tool.
Thunar Custom Actions (alternative)
In Xubuntu 14.04, the default file manager is Thunar. Similarly, Thunar has already built-in Custom Actions that manages the custom context menus.
The screenshots above were taken from my own machine, running Xubuntu 14.04 with custom theme colour. By default, there are only two items: "Open Terminal Here", "Find in this folder".
How to do workaround
By using either of two configuration tools, create a new action i.e. "Open file without recovery" in context menu that includes the command line of LibreOffice with
Typical command line looks like this:
libreoffice --norestore -o FILENAME
FILENAME is replaced with the document filename i.e.
test.odt, which could also be multiple files separated by a space after each filename i.e.
-o is to open documents regardless whether they are templates or not
In Nautilus Actions, it is modified to this:
libreoffice --norestore -o %M
%M is the full path to the selected file or files; Use
%F for version 2.99 or newer
In Thunar Custom Actions, it is modified to this:
libreoffice --norestore -o %F
%F is the paths to all selected files
Additionally, the custom context menu can be made visible for certain files only i.e.
*.odt,*.doc such that the menu will only appear if files with specified extensions were selected.
The workaround in action
Since my machine is running Xubuntu 14.04, I will demonstrate using Thunar only. Select one or multiple files and right-click on mouse to open the context menu.
Then, select "Open file without recovery" (or whatever name given to the custom menu) to skip the recovery dialog and open the documents directly in LibreOffice.
While I have tested the workaround using LibreOffice 184.108.40.206 and Thunar Custom Actions in Xubuntu 14.04, I didn't do any test using Nautilus Actions in anyway. However, I have taken care and checked the customization options in Nautilus Actions based on my finding on the Web.
How to prevent LibreOffice running 'recover' at each startup? on Super User.
Manpage of libreoffice - LibreOffice office suite on Ubuntu Manpage.
Version changelog for Nautilus Actions on GitHub repository, last visited on 2016.01.01.