diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e69c363c3..b0cb280ff 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -4,6 +4,7 @@ D1X-Rebirth Changelog
 --------
 main/kconfig.c, main/kconfig.h, main/menu.c, main/playsave.c, main/playsave.h: Introduced sensitivity sliders for keyboard which cause movement increase the longer the designated key is pressed
 main/gauges.c, main/menu.c, main/net_udp.c, main/songs.c, misc/physfsx.c: use size of output buffer for snprintf; on the way changed rebirth-specific song file to dxx-r.sng to respect hog 8+3 file convention
+editor/med.c, misc/physfsx.c: changed extension for archive (addon) content from zip to dxa - still a zip-file but renamed to not accidentially add user generated backups and possibly mess things up
 
 
 20120527
diff --git a/editor/med.c b/editor/med.c
index ce9687419..853be01f3 100644
--- a/editor/med.c
+++ b/editor/med.c
@@ -377,6 +377,7 @@ void init_editor()
 	PHYSFSX_addRelToSearchPath("editor/data", 1);	// look in source directory first (for work in progress)
 	PHYSFSX_addRelToSearchPath("editor", 1);		// then in editor directory
 	PHYSFSX_addRelToSearchPath("editor.zip", 1);	// then in a zip file
+	PHYSFSX_addRelToSearchPath("editor.dxa", 1);	// or addon pack
 
 	ui_init();
 
@@ -973,6 +974,7 @@ void close_editor() {
 	PHYSFSX_removeRelFromSearchPath("editor/data");
 	PHYSFSX_removeRelFromSearchPath("editor");
 	PHYSFSX_removeRelFromSearchPath("editor.zip");
+	PHYSFSX_removeRelFromSearchPath("editor.dxa");
 
 	switch (ModeFlag)
 	{
diff --git a/misc/physfsx.c b/misc/physfsx.c
index 65baf1343..32b88b02d 100644
--- a/misc/physfsx.c
+++ b/misc/physfsx.c
@@ -457,7 +457,7 @@ PHYSFS_file *PHYSFSX_openWriteBuffered(char *filename)
 void PHYSFSX_addArchiveContent()
 {
 	char **list = NULL;
-	char *archive_exts[] = { ".zip", ".7z", NULL }, *file[2];
+	char *archive_exts[] = { ".dxa", NULL }, *file[2];
 	int i = 0, content_updated = 0;
 
 	con_printf(CON_DEBUG, "PHYSFS: Adding archives to the game.\n");
@@ -515,7 +515,7 @@ void PHYSFSX_addArchiveContent()
 void PHYSFSX_removeArchiveContent()
 {
 	char **list = NULL;
-	char *archive_exts[] = { ".zip", ".7z", NULL }, *file[2];
+	char *archive_exts[] = { ".dxa", NULL }, *file[2];
 	int i = 0;
 
 	// find files in Searchpath ...