[S]It looks like it might be. Let me reupload the file. This may explain the problem that a couple of other users are seeing.[/S]
The issue was due to downloaded and attempting to unzip the file using a Mac (which I use as well and have reproduced the problem). The issue is that, by default, the later versions of OS X do not include Stuffit Expander which properly handles zip files from the desktop. The standard decompressor can't handle the file format. Luckily there are two ways to address this:
1) If you are comfortable using the Terminal application just "cd" to the directory where you downloaded the zip and run the following command:
unzip dto_thread_move_1_0_1_1.zip
This will expand the file properly
2) Install the latest version of
StuffIt Expander. Once installed launch the application and click on StuffIt Expander >> Preferences. Scroll down the list presented, click on ZIP, and click on Assign to StuffIt Expander.
Double click on dto_thread_move_1_0_1_1.zip using the Finder and it should decompress properly.
With this information we'll be adding some additional information on this for Mac users to our product release notes on vbulletin.org.
Thanks!
Mark