** Using WeBWorK **

Look at

https://webwork.maa.org/wiki/Converting_the_webwork_database_from_the_latin1_to_the_utf8mb4_character_set#Methodology

for information on transferring courses.  Obviously, the main purpose of the documentation is different but it covers various methods.   If you don't have too many courses, the archive/unarchive method may be just as fast and safer.