Hi Aldevinas,
Agnieszka's suggestion on the 2019-12-30 did not help?
1. export register content to file. You can do it using Module Database Maintenance > Exports > Register export > specify RLinkVC
2. in file find all records that have old company code and change it to new company code (company code is stored in first field
3. change header of the file so it is overwriting data
4. copy database in case to have option to go back if anything is wrong in your file by accident
5. import file and check if all good
Regards