When creating a new project in eclipse plugin, next and finish buttons are disabled
(The environment variable DALsdk is defined).
Usually this is an issue with the JAVA JDK version. try to use an older JDK (8\9) and not OpenJDK.
if you have already installed a newer JAVA version - remove its path from the PATH environment variable of the system.
Note that DALsdk installation dir path should contain Latin letters only without white spaces.
any changes above requires restarting the eclipse IDE