LESS Editor not available (compatible) in Eclipse 4.7. (Oxygen)

Hi,

ich daily used the LESS editor in eclipse 4.6 (Neon). Now I updated eclipse to 4.7 and after resolving all dependancy problems (with xtext) the LESS Plugin is installed but I cannot associate it with *.less files.

Has anybody an idea how to solve this issue? Are there any plans to make make the plugin compatible with the current eclipse versions?

Thanks a lot
Julian