Hi folks,
Please can anyone advise me how best to 'update' very many old XLS (version4) excel files to XLSX format (without manually opening each one, and re-saving it in the xlsx format!)?
My old files are now being used in a school environment in which the default 'trust' policies to not allow such old files to run (or at least, not to be edited). That's why I need to change them all.
I've manually changed a couple and they then work perfectly well, but I've hundreds (distributed throughout many different directories) that I'd like to change 'all at once'.
I'd appreciate any advice, thanks,
UKMathsTeacher
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