A customer asked me to use Studio 2019 for an (xml-) job a couple of days ago. Since I have both CATs on my machine, is used the 2019 version but included the TB MT 2021 (Desktop) because it contained the latest terms. Everything went well. A couple of days later, the customer had his CAT upgraded to Studio 2021 SR2. The 2021 selected the TM used in 2019. I wanted it to be used with the 2021 but I could not convert the 2019 TM to a 2021 TM. So I exported to the 2019 TM as TMX, created a new TM and imported the created TMX to 2021. The TM still sadly was set to 2019. In a following attempt to repair the 2021 via "System Control", there was only the 2019 but no 2021 that I could repair. How to get the 2021 back to the programs listed in "System Control"?