Menu item "Edit: Add From Textfiles" is
used to import texts from files, either plain text files (*.txt) or
HTML files (*.htm, *.html).

Opens a dialog to select the text or HTML files to add to the database.
Adds all marked files in the list to the database.
Stops adding of textfiles.
FtFind adds some additional lines at the very end of each text (file's name and time and a checksum of the text).
The added "{checksum=...}" line is used to
recognize texts that are already in the database. Identical copies of an
already existing text will be ignored and will not be added to the database
again.
The added "{filename=...}" line is used to
recognize modified texts. If a text with the same file name is already in
the database, the old text will be replaced by the new text.
Files with an extension of ".htm" and
".html" are treated as HTML and will be converted to
text. All other extensions (especially ".txt") will
be treated as plain text files.