I have office 2007. Today I opened a templete made some changes and saved it
with an updated name. Now every time I try to open the file I get the message
"Excel cannot open the file 'Estimator 5.22.07.xltm' because the file format
of file extension is not valid. Verify that the file has not been corrupted
and that the file extension matches the format of the file." I can still
opent the older file 'Estimator 5.10.07.xltm' What gives? I only chaged some
values, very basic changes. The only thing I can think of is that my computer
ran Automatic update and did update 1 thing. Also, this is the second time I
have made these changes and resaved with the same results.