@@ -9,13 +9,13 @@ STACK is based on continuing research and use at the University of Edinburgh, th
## Current state of development
STACK 4.2 contains some important new features, and a number of interface improvements and bug fixes.
STACK 4.2 contains some important new features, a number of interface improvements and bug fixes.
**Note: please read the release notes before upgrading from STACK 3.X to STACK 4.X. STACK 4.0 represents a major release of STACK and is a non-reversible change, with important differences which break back-compatability. Especially, note the [conversion of old materials](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Authoring/ImportExport.md#migrating-stack-3-questions-to-stack-4).**
**Note: please read the release notes before upgrading from STACK 3.X to STACK 4.X. STACK 4.0 represents a major release of STACK and is a non-reversible change, with important differences which break back-compatibility. Especially, note the [conversion of old materials](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Authoring/ImportExport.md#migrating-stack-3-questions-to-stack-4).**
Please continue to report any bugs you find at https://github.com/maths/moodle-qtype_stack/issues.
The [current state of development](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Developer/Development_track.md) is explain more fully in the [developer documentation](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Developer/index.md).
The [current state of development](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Developer/Development_track.md) is explained more fully in the [developer documentation](https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/Developer/index.md).