Oops, didn't even think about old versions of Time Master, but glad you got it working. The original version of the Dropbox API (programming interface) was version 1.0. Dropbox said that they were going to drop support for 1.0 on Dec 1st, 2012, but they delayed it and possibly it just expired. We updated to the new DB API in Time Master v5.6, so as long as you are using TM 5.6 or greater, it should work.