It doesn't appear this link to Interakt's PHP 5.3 patch for ADDT 1.0.1 has been posted here yet.
If you have trouble having the download dialog box open like I did, just right click on the Download File and save as.
I had over a dozen websites developed with ADDT and this patched fix all my PHP 5.3 issues.
I simply uploaded and replaced the 18 files that come in the patched zip.
There is also a step-by-step guide on how to update the files on your own if you rather do that.