AMPS version 6.3.18 is now available
There are number of bug fixes and improvements in this release - in particular around Tomcat versions.
Full details can be found in the Release Notes
How to use AMPS 6.3.18
Use the flag -u 6.3.18 to specify the AMPS version when running your atlas- commands (or you can specify the AMPS version in the POM).