Problem with mouse

With the last versions of TCMD 33.00.17 and 33.00.18 I can't use the mouse in TCMD. When I click in the tab the content of the tab becomes plain gray; I can't select text nor double-click.
This seems to happen only with the tabs opened from the toolbar. I don't have the problem with TCMD 32 or with TCMD 33.00.11.
This could come from some mouse support software (I have KensingtonWorks and ContourDesignExecutive2 installed), but something changed with the last versions of TCMD.