debian/copyright

 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Source: https://github.com/omegat-org/omegat
 Files-Excluded:
+ gradle/wrapper/*
  lib/*
  native/*
+ release/*/*.exe
+ release/*/*.app
  nbproject/*.jar
 
 Files: *

debian/watch

-version=3
-opts=dversionmangle=s/\+dfsg\d*$// \
-  http://sf.net/omegat/OmegaT_([\d.]+)_(\d+).*Source\.zip \
-  debian
+version=4
 
+opts=dversionmangle=s/\+dfsg\d*$//,\
+  uversionmangle=s/.Beta/~beta/;s/\.$// \
+  http://sf.net/omegat/OmegaT_([\d.]+)_?([\dBeta]*).*Source\.zip \
+  debian