UIE DEVELOPER2.0の起動がうまくいかない原因は環境変数では

ないですね。

Workspaceのログを見ると↓
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!MESSAGE An error occurred while automatically activating bundle com.uievolution.ddt.debug (4).
!MESSAGE An error occurred while automatically activating bundle com.uievolution.ddt.core (3).
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!MESSAGE Plug-in com.uievolution.ddt.core was unable to load class com.uievolution.ddt.core.internal.repository.server.ServerRepositoryStartup.
!MESSAGE Plug-in com.uievolution.ddt.core was unable to load class com.uievolution.ddt.core.internal.repository.server.ServerRepositoryStartup.
!MESSAGE Unhandled Exception
!MESSAGE Unable to execute early startup code for an extension
!MESSAGE Plug-in com.uievolution.ddt.core was unable to load class com.uievolution.ddt.core.internal.repository.server.ServerRepositoryStartup.
!MESSAGE An error occurred while automatically activating bundle org.eclipse.team.core (89).

以上のメッセージが検出されます。ワークベンチの読み込みに失敗しています。