please have a look to the section Undock the Log window and Hide/Show the Log window. This should answer your question.
If you still cannot find the Log window and you want to recover the default position of all Embedded Wizard Studio windows, you can do the following:
Exit Embedded Wizard Studio
Start Windows RegEdit and navigate to the following registry key:
HKEY_CURRENT_USER\Software\TARA Systems\Embedded Wizard Studio\<Version>\<Free or Pro>\<Number>\<DPI>\Workspace
Delete the key Workspace and start Embedded Wizard Studio again. Now, the IDE starts with default settings.