Remove User Preferences Files.
Make sure "Hidden Items" is checked if the "ProgramData" folder is missing.
![image image](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/2043209420282/original/loDh_S2Sx3FPV9YXDD678fEO-1vXDoAWPA.png?1617916858)
Go to the folder below and delete all the files and folders in it.
For Gibbs 14.0.15 or older:
C:\Users\UserName\AppData\Roaming\3D Systems\GibbsCAM\XX.X.XX
For Gibbs 14.0.21 or newer:
C:\Users\UserName\AppData\Roaming\CAMBRIO\GibbsCAM\14.0.21
![image image](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/2043209421243/original/zecs-jCiuvN87Vx48qebRa-A16amQKx4Vg.png?1617917173)