diff --git a/Viewer/Makefile b/Viewer/Makefile
index 3246c5dc..ae2f3a46 100755
--- a/Viewer/Makefile
+++ b/Viewer/Makefile
@@ -283,7 +283,6 @@ CSS_DIR = css
 CFG_DIR = cfg
 DOMAIN_DIR = imagegrid
 FEATURES_DIR = features
-WORKERS_DIR = workers
 IMAGES_DIR = images
 ASSET_DIR := data
 
@@ -299,7 +298,6 @@ ROOT_JS_FILES := $(wildcard *.js)
 JS_FILES := $(ROOT_JS_FILES) \
 	$(wildcard $(DOMAIN_DIR)/*.js) \
 	$(wildcard $(FEATURES_DIR)/*.js) \
-	$(wildcard $(WORKERS_DIR)/*.js) \
 	$(wildcard $(LIB_DIR)/*.js) \
 	$(wildcard $(LIB_DIR)/*/*.js) \
 	$(wildcard $(EXT_LIB_DIR)/*.js)
@@ -656,7 +654,7 @@ $(BUILD_DIR)/$(APP_NAME)/: $(PROJECT_FILES) \
 	$(MD) "$@"
 	cp -r $(PROJECT_FILES) $(ROOT_JS_FILES) $(HTML_FILES) \
 		$(CFG_DIR) $(LIB_DIR) $(EXT_LIB_DIR) $(FEATURES_DIR) \
-		$(DOMAIN_DIR) $(WORKERS_DIR) $(CSS_DIR) $(IMAGES_DIR) \
+		$(DOMAIN_DIR) $(CSS_DIR) $(IMAGES_DIR) \
 		$(ASSET_DIR) \
 		$(BUILD_INFO) \
 		$(LICENSE) \
diff --git a/Viewer/doc/NOTES b/Viewer/doc/NOTES
index dbc2b219..18e9a27c 100755
--- a/Viewer/doc/NOTES
+++ b/Viewer/doc/NOTES
@@ -1,4 +1,25 @@
 
+Debugging startup errors
+========================
+
+If something goes wrong on startup -- the splash screen is shown but the 
+main window is not, DevTools should be automatically started in about 5 
+seconds.
+
+If DevTools does not run then they can be started manually by:
+	$ IMAGEGRID_DEBUG=1 ig.js gui
+or:
+	$ IMAGEGRID_DEBUG=1 make run
+
+Common reasons for failure on startup:
+	- path set in cfg/requirejs.js (baseUrl) is not correct on this 
+	  version on node/electron
+	- electron compatibility issue 
+	- rarely: some feature fails to call .declareReady() and the 
+	  startup process stalls waiting for it, this can be manually
+	  overridden by calling .ready()
+
+
 Modules and RequireJS
 =====================
 
diff --git a/Viewer/e.js b/Viewer/e.js
index a966cfe7..8c963c15 100644
--- a/Viewer/e.js
+++ b/Viewer/e.js
@@ -136,9 +136,11 @@ function createWindow(){
 		function(){ WIN = null })
 
 	// devtools for different windows...
+	//process.env.IMAGEGRID_ROOT_DEBUG
+	//	&& WIN.openDevTools({mode: 'undocked'})
 	process.env.IMAGEGRID_DEBUG
 		&& WIN.openDevTools({mode: 'undocked'})
-	//WIN.webContents.openDevTools({mode: 'undocked'})
+		//&& WIN.webContents.openDevTools({mode: 'undocked'})
 
 	return WIN }