I just downloaded Libre Office and want to save many documents from Free Office 2016. How other thanopening one at a time do I accomplish this?
Why do you want that? IMO, it’s better to keep them in original format, and only convert one-by-one as necessary - i.e., when you need to edit one. Rationale: our import filters improve over time; bulk conversion today would produce worse results than tomorrow.
You can use command line parameters to convert multiple files at once:
soffice --convert-to odt --outdir <output dir> path/to/*.ext
If your OS is windows, the * wildcard would not work, and you’d need a workaround like in this answer.