Because ProjectTemplate is still beta software, there are a number of backwards incompatible changes introduced with each iteration of the package. The information below should help you upgrade an existing project to work with the newest version of ProjectTemplate.

Updating a v0.3-5 (or later) Project
Updating a v0.3-4 Project to a v0.3-5 Project
Updating a v0.3-3 Project to a v0.3-4 Project
Updating a v0.3-1 Project to a v0.3-3 Project
Updating a v0.2-1 Project to a v0.3-1 Project
Updating a v0.1-3 Project to a v0.3-1 Project