After installing or reinstalling one of Discngine's collection, you may have old icons instead of the Discngine ones. This can happen if the installation was not done properly.
It can happens that the icons of the Pipeline Pilot collections do not look as they should, but with an old look. This issue will mainly happen after reinstalling a collection.
In this case, check the content of the file located at <PPS>/apps/pkgalias.conf. This file is used to define the component's icons and custom paths. When reinstalling a collection, if you have done some backup and used the pkgutil -r command, the old configuration can be kept into this file, and interfere with the new one.
To solve this issue, edit the pkgalias.conf file and remove rows corresponding to the backup versions of the collection. The old versions will be delimited by comment lines "#BEGIN:discngine/name-of-collection" and "#END:discngine/name-of-collection".
Once done, restart the apache server. The regular icons should be back.
Recommendation: When reinstalling a collection, use 'pkgutil -u' and 'pkgutil -i' instead of 'pkgutil -r' to avoid this.