msi not registered plugins in browsers

install_flash_player_19_active_x.msi and install_flash_player_19_plugin.msi installed without errors  (winxp and win7).

in "Programs, and Function" added entry "Adobe Flash Player 19 ActiveX" and "Adobe Flash Player 19 NPAPI" (both - version 19.0.0.245).

But in browsers (IE8, IE11, Firefox42) previous version 19.0.0.226 disappears from the list of plug-ins, and version 19.0.0.245 doesn't appear.

with version 19.0.0.185 - there are no problems.