Help with writer files

Everything was working great until two days ago, I can no longer read any
of my saved files in doc format.
It opens into garbled text like this:

Íòmë
#>3jÄe_M?7kÒcŨWQyS#C<l¹jíŸ#ó�DÚ`WŽ{Œ#ñ·ÍÁ%×v#&JÙ»HdÈ#\”†‡#|#îƒK«#�Mˆkûò¿¦Òi-##’´#ðáo&¹#iû8ðª&˜s!ô(Vò$¨eJD€PC9¥µWIv‰3…GÚÈ#ß

ys—…+1�×#Ý###Ùq<âæ#u#Jô:4ŽWKÈ×_B›Û-0mç
ˆï,I^úyõ,ˆZ6´a�Q28š#–#—¾X#©¸î;Ÿ ö
'9\¸+:�±â8³#š#Î>ò;èçV,‰Â°T#ÁDÿxÆÁÉ–�áÙ6”ƒ

Documents that were created in the past week open up with no issues,
just my previously saved documents converted from word are the issue.

Any help is appreciated

​Andrew, to me this sounds more like an encoding problem than an LO problem​
​ - you would normally want your documents to be encoded in utf.8. What
operating system are you using ? If Linux, this web page might prove
helpful : https://help.ubuntu.com/community/Locale

Henri