The timestamp only indicates file download date, so we seem to be using the same file/product version.
Rarely if ever, errors may occur during the download. Calculating md5sum is one of the best methods to check whether on not the download was successful. I have calculated the md5sum for Heather’s .exe installer so that you could make sure the exe file you downloaded is ok.
If you move the file TextAloud\UserTranslations.chl) from the program folder to a different location, TextALoud should create a new empty file upon the restart, so you will be able to see if the dictionary is causing any problem without deleting your pronunciation edits.
Open TextAloud, click Help -> Open Data Folder, locate UserTranslations.chl, cut the file, paste it to, say, desktop, go File->Exit. When you restart TextAloud, a new empty UserTranslations.chl file will be created.
move the backup copy of UserTranslations.chl back to \TextAloud\ folder overwriting the empty file, then restart TextAloud.
You may find more info on backup/restore procedure by checking out this topic: