The repository database stores all the information about connections, transformations, packages, SQL scripts, reports and execution logging. This is where the results of ETL designer hard work is stored and obviously, no one wants to lose it.
More information about the repository can be found in our ETL wiki
Please always make a repository backup before making any changes.
For the very old versions, the repository update can be a complex task. We are always happy to do it for you on a chargeable basis. The price for the repository update service is $150.