There are certain instances where the LDF (SQL Database Transaction Log File) for the Unity Real Time database can grow excessively. In most cases, this is due to the "Recovery Model" being set to "Full" instead of the correct setting "Simple". Please change the "Recovery Model" from "Full" to "Simple".
Please see the screen shot to outline the way to change "Recovery Model" for Unity Real Time Database.
Select Database --> Properties --> Options --> Recovery Model
A SQL script is available as well that can be run through a standard DOS Prompt. Please contact Bio-Rad Laboratories Software Support at the number below for the script.
Bio-Rad Laboratories Software Support
If you require further assistance, please contact Bio-Rad Software Support at 800-854-6737, option 3