Did you follow the install procedure as outlined
here?
Provided that the installation has been performed correctly, you should have a folder named "DarwinBotsII" somewhere on your hard drive.
Under this folder there should be a number of sub directories.
"Autosaves"
"Leagues"
"Robots"
"Saves"
"Settings"
"Transfers"
Most of these are put in place by the original installation of 2.11 but some modifications to the file structure have been made for version 2.3 and later. The new folder "Leagues" is added when you unzip the later versions. It is possible that one or two of the latest releases may not have the file structure included though as some releases have just included the most basic copy of the game itself and the sysvars file.
If you do not have these folders then you can just create them yourself easily enough. I have included a default setting file in this post. Just download it and place it in the "settings" folder.
Unless you have the correct robots in your robots directory, it may be necessary to manually browse for them when you first run the game. My default uses "Carnatus Orbis" and "Alga Minimalis". (both available in the beastiary or the DB database
follow the links section for the database for download)
Once you have the game working, please save your own settings file for future use.
Hope this helps
PS welcome to DB