I have found instructions on the Net for stopping that rather intrusive 'Paste Options' pop-up button appearing in Excel 2003, 2007 and 2010 (I think; or it might have been 2011). But I have Excel 2008, and none of the instructions I have found applies. I cannot find a Microsoft Office button (other than the icon of the folder in Applications); nor is there 'Options' in the File menu. I use a Mac mini (Intel) with OS 10.8.4 (Mountain Lion).

I should be very grateful for advice.