diff --git a/frappe/__init__.py b/frappe/__init__.py
index 5dd11fd72f..781f850a86 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -438,7 +438,14 @@ def get_hooks(hook=None, default=None, app_name=None):
 		hooks = {}
 		for app in [app_name] if app_name else get_installed_apps():
 			app = "frappe" if app=="webnotes" else app
-			app_hooks = get_module(app + ".hooks")
+			try:
+				app_hooks = get_module(app + ".hooks")
+			except ImportError:
+				if local.flags.in_install_app:
+					# if app is not installed while restoring
+					# ignore it
+					pass
+				raise
 			for key in dir(app_hooks):
 				if not key.startswith("_"):
 					append_hook(hooks, key, getattr(app_hooks, key))
diff --git a/frappe/cli.py b/frappe/cli.py
index d654b2eff7..9c3f1055d4 100755
--- a/frappe/cli.py
+++ b/frappe/cli.py
@@ -140,6 +140,8 @@ def setup_install(parser):
 		help="Install a new app")
 	parser.add_argument("--add_to_installed_apps", metavar="APP-NAME", nargs="*",
 		help="Add these app(s) to Installed Apps")
+	parser.add_argument("--remove_from_installed_apps", metavar="APP-NAME", nargs="*",
+		help="Remove these app(s) from Installed Apps")
 	parser.add_argument("--reinstall", default=False, action="store_true",
 		help="Install a fresh app in db_name specified in conf.py")
 	parser.add_argument("--restore", metavar=("DB-NAME", "SQL-FILE"), nargs=2,
@@ -352,9 +354,17 @@ def add_to_installed_apps(*apps):
 	from frappe.installer import add_to_installed_apps
 	frappe.connect()
 	all_apps = frappe.get_all_apps(with_frappe=True)
-	for each in apps:
-		if each in all_apps:
-			add_to_installed_apps(each, rebuild_website=False)
+	for app in apps:
+		if app in all_apps:
+			add_to_installed_apps(app, rebuild_website=False)
+	frappe.destroy()
+
+@cmd
+def remove_from_installed_apps(*apps):
+	from frappe.installer import remove_from_installed_apps
+	frappe.connect()
+	for app in apps:
+		remove_from_installed_apps(app)
 	frappe.destroy()
 
 @cmd
diff --git a/frappe/installer.py b/frappe/installer.py
index 96e04a7aff..4edb7b26a0 100755
--- a/frappe/installer.py
+++ b/frappe/installer.py
@@ -127,14 +127,23 @@ def add_to_installed_apps(app_name, rebuild_website=True):
 		installed_apps.append(app_name)
 		frappe.db.set_global("installed_apps", json.dumps(installed_apps))
 		frappe.db.commit()
+		post_install(rebuild_website)
 
-		if rebuild_website:
-			render.clear_cache()
-			statics.sync().start()
-
+def remove_from_installed_apps(app_name):
+	installed_apps = frappe.get_installed_apps()
+	if app_name in installed_apps:
+		installed_apps.remove(app_name)
+		frappe.db.set_global("installed_apps", json.dumps(installed_apps))
 		frappe.db.commit()
+		post_install()
 
-		frappe.clear_cache()
+def post_install(rebuild_website=False):
+	if rebuild_website:
+		render.clear_cache()
+		statics.sync().start()
+
+	frappe.db.commit()
+	frappe.clear_cache()
 
 def set_all_patches_as_completed(app):
 	patch_path = os.path.join(frappe.get_pymodule_path(app), "patches.txt")
diff --git a/frappe/utils/backups.py b/frappe/utils/backups.py
index a01508f058..9186e2d626 100644
--- a/frappe/utils/backups.py
+++ b/frappe/utils/backups.py
@@ -133,7 +133,7 @@ def get_backup():
 						  frappe.conf.db_password, db_host = frappe.db.host)
 	odb.get_backup()
 	recipient_list = odb.send_email()
-	frappe.msgprint(_("Download link for your backup will be emailed on the following email address:").format(', '.join(recipient_list)))
+	frappe.msgprint(_("Download link for your backup will be emailed on the following email address: {0}").format(', '.join(recipient_list)))
 
 def scheduled_backup(older_than=6, ignore_files=False, backup_path_db=None, backup_path_files=None):
 	"""this function is called from scheduler