I think this is probably a bug, but maybe there's a workaround:
In EPiServer 4.61, if I use the search tool when choosing a property value of 'URL to document' or 'URL to image', I get a search form, and then a list of file names and paths in the results.
I can click on the file name and view the file, or click on the path to navigate to the folder containing the file, but I CAN'T choose the file (the 'Insert' button is disabled).
Is there any way for me to get the desired behaviour - our current project is for a user with several hundred images in each of several folders. Being able to select the folder isn't much help for our users.