Problem solved, fixed by simply logging out and back in again...twice.
Another issue I am having relates to the referencing of an Excel file into layout. Previously it worked fine...open up the file, amend it, save it then update in layout and and all good. Now that I have updated to Office365 and Onedrive for my files, the only way to update the Excel file in LO is to close the file. The same file works OK when on Dropbox so is this a onedrive setting / permissions issue? If anyone else has had this issue then I be interested to hear how you fixed it. Thanks