Leonid,
Yes, you can remove the plugin from your profile. Open MyEclipse Configuration Center. Select Software tab. If you have added the plugin to your ME profile by mistake, choose the My Software section. Look for the said plugin under – “Personal Software”. Select the plugin to be removed from your profile. Right click on the plugin and from the context menu click on remove. Next under Pending Changes, notice it will update this section with managed changes. Click on the button [Apply x change]. This will open a wizard which will guide you through the rest of the steps.
Hope this helps.