Re-install previous versions

When a user uninstalls a version of Premiere (as a troubleshooting method), it seems obvious Adobe should make the SAME version available for re-installation. I uninstalled version 15.4, which is the MOST CURRENT VERSION I'M ABLE TO USE. However, 15.0 was the only version I could wrangle from tech support. This version DOES NOT HAVE THE SAME TRANSCRIPTION FUNCTION AVAILABLE IN 15.4!!! WHY CAN 15.4 NOT BE MADE AVAILABLE TO ME for re-installation? UNACCEPTABLE!