I am able to install Denodo4E plug-in for Eclipse successfully and create project without any issue by clicking on File and navigating to "New > Project". In the pop up window, I will click on **Denodo4E** folder and select "Denodo Extension Project" option.
For more details, you can refer to [Installing Denodo4E](https://community.denodo.com/docs/html/browse/7.0/denodo4e/install_denodo4e/install_denodo4e) and [VDP/ITP Server Tutorial](https://community.denodo.com/docs/html/browse/7.0/denodo4e/vdp_itp_server_tutorial/vdp_itp_server_tutorial) sections of the Denodo4E User Guide which explains in detail how to install Denodo4E plugin and crate, debug and deploy a custom stored procedure for Virtual DataPort.
Note that Denodo4E plug-in of Denodo Platform 8.0 version requires executing Eclipse with Java 11 (at least).
In case, if you still need help and if you are a valid Support User, you may open a Support Case at the Denodo Support Site and the Support Team will help you.
Hope this helps!