If there is an error in the cache or other preference files a re-install will not correct them as they are established after installation.

A re-install is a lot more complex and time consuming than simply resetting preferences. Depending on where the error is re-install may be necessary but I would certainly try resetting preferences as outlined in post 1 above first.

There are several posts on the keyword file and how to save it. It has been at least 4 months ago as I remember. Search is not too great so might have to try different ideas and then look through all the posts in that category. Sometimes a gem response gets slipped in a question that is not directly related to question.

Try searches for keyword, network sharing of keywords, re-install and ? in search and also knowledgebase search. You can also look in your directory under Adobe and see if anything pops out at you.