As outlined in your original installation download email ... it is the client's responsibility to maintain a copy of the original installation file in the event that a re-installation is required at a future date. That file was a complete installation file ... the same file that would have been provided on a CD ... and can be copied to a memory stick, CD or other external media and stored in a secure location in the event a re-installation is required in the future.
We do not and cannot supply legacy installations. The only installation we can provide is for the current version of the software ... and that would come with an UPGRADE charge. Software UPGRADE pricing can be reviewed here : https://www.buykipware.com/store/Kipware-UPGRADES-c19807030/
If you do not have your original installation file and your purchase is more than (6) months old ... you will need to purchase an UPGRADE. Pricing and purchase options can be found HERE.