i had the same issue since yesterday, and as far as i can see, i am running 40.2.405.1. there are question marks by Latest Version.
is this version different from the one you mention? with 0405 instead of plain 405?
i thought it had something to do with the wow mouse i installed yesterday, but that is apparently not the case?
04 05 is April 5th, it doesn't matter if it's 405 or 0405 it's the same version number.

If you're on this build of ISBoxer, and have done an
Export to Inner Space since updating to this build, and "swapping is broke", then the issue described in this thread
must different from the issue you are experiencing and we would have to talk about your configuration. In fact, in order to experience the issue in this thread, you must have
manually switched to the development build of Inner Space, through the IS patcher window, in order to be currently on Inner Space build 5575. (Right click IS, check or un-checked "Download development (test) patches", then close and restart Inner Space to allow it to patch)
You can switch to the live (non-development) build of Inner Space, if you're not already on it, to eliminate any chance of this bug (which is fixed in 40.2.405.1 of ISBoxer as long as you Export to Inner Space after updating) affecting you.