From Michael Speck via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4726 :

If "Help -> About Wireshark" is selected from Wireshark's main menu an error
message pops up:

Could not open file "<DevelopmentPath>\Wireshark_Source\wireshark-gtk2\COPYING":
No such file or directory


The attached patch handles this situation by looking for COPYING.txt instead of
COPYING on windows systems.

svn path=/trunk/; revision=32596

gtk/about_dlg.c

@@ -475,7 +475,11 @@ about_license_page_new(void)
   GtkWidget   *page;
   char *absolute_path;
 
+#if defined(_WIN32)
+  absolute_path = get_datafile_path("COPYING.txt");
+#else
   absolute_path = get_datafile_path("COPYING");
+#endif
   page = text_page_new(absolute_path);
 
   return page;