Creating 'user://library' dir on startup so files can be saved

material_maker/tools/library_manager/library_manager.gd

@@ -40,7 +40,7 @@ func _ready():
 func _exit_tree():
 	if item_usage_file == "":
 		return
-	DirAccess.open("res://").make_dir_recursive(item_usage_file.get_base_dir())
+	DirAccess.make_dir_recursive_absolute(item_usage_file.get_base_dir())
 	var file = FileAccess.open(item_usage_file, FileAccess.WRITE)
 	if file != null:
 		file.store_string(JSON.stringify(item_usage, "\t", true))
@@ -55,6 +55,7 @@ func init_libraries() -> void:
 		add_child(library)
 		library.generate_node_sections(node_sections)
 	library = LIBRARY.new()
+	DirAccess.make_dir_recursive_absolute(user_lib.get_base_dir())
 	if library.load_library(user_lib):
 		if library.library_name == "":
 			library.library_name = user_lib_name