If you are unable to start Eclipse with the following error:
java.lang.NoSuchFieldError: url
Please follow these steps to resolve the issue:
1. Open the [eclipse_root_folder]/plugins
folder.
2. Delete the com.genuitec.eclipse.theming.icon.designer_[version].jar
file.
3. Start Eclipse.
This issue only affects Eclipse Neon users who had installed the DevStyle Icon designer. After applying this fix, your themes will remain unaffected.
An update will be released shortly with a fix to the Icon Designer, sincere apologies for the disruption.