Michael,
Sorry that you are seeing this issue.
We recently fixed a problem with CodeMix locking the project’s bin folder and it looks like you are seeing a similar issue.
1. Can you please share with us more details about the output folders in your project which exhibits the locking problem? Is bin the default output folder or is it set to a different folder? You can get the details from the Source tab of the Java Build Path properties page of the project.
2. Do you see any errors logged in the Error Log view when trying to do a clean build of your project? If yes then please share with us the workspace log by clicking on the Export Log icon in the Error Log view.
Apologies for inconvenience caused. We hope to fix this problem soon.
–Swapna
Genuitec Support