Also, what may be possible is that the fix we implemented with version 1.5 may not work until you reinstall. In other words, if you incrementally added each update, the update process on it's own would not resolve the file size for those that already had an over-sized cache. A reinstall would be necessary.
Now that you have uninstalled, if you could reinstall and use the app - watch the file size and let me know right away if you're seeing it grow too large. We are working on reproducing this and we would really appreciate your help.