I found why it may not sync a file Rated 4 out of 5 stars
I found a bug that may explain why some users say it does not work.
When you synchronize your local AB by importing a mab file from somewhere else, most of the time, it won't work.
Solution : on the "operation" tab you are, first, choose "export to" and uncheck the corresponding box "if newer". Then, you can choose "import from".
You must do this for each operation tab you set.
I will send a mail to the author. Hope he will fix it, but I did not find any ref to syncmab on his site anymore....
Other wise, it works fine !