Simply go to Codestyling plugin and "Sync" the translation files.
Sometimes after the update the translation files loose index values, re-sync the files would revert them to original status.
Let me know if this helps.
Also it would be great if you can send the translation files to us, so that we can include them in our next update and you do not face any issues while upgrading.
When sending the translation files, please include the header "Translation files to WPLMS" and send it at
[email protected] or
[email protected]