For some reason my .xla add-in file containing forms and code (saved as an .xla when created) has now saved itself as a .xls file. I cannot open it as a .xls file via Excel and re-convert to a .xla file format and I cannot save it as a .xla in the VB editor. I cannot seem to change the file extension to .xla in explorer either... Anyone know why this is happening and how I can get it back to an .xla file format?