When I click the "X" to close the Control Bar if it's not docked, it no longer displays when called again, and it also crashes ZWCAD when the "QUIT" command is executed.
None of this happens if the Control Bar is docked.
I can't work around this issue.
It's important to note that this also happens with the OpenDCL Samples Palette.
I have the same problem
I can reproduce this. I'll try to fix it in the next update.