When downloaded from the AIC Portal, the DMT is storing the data from package process in a local Delivery Folder.
This delivery folder is located in the path C:\Users\<USER>\AppData\Local\CAST\CAST\DMT\<AIC Portal UUID>.
If you have deployed many AIC Portal, you will see many AIC Portal UUID like below screenshot :
To know what AIC Portal uuid to select, edit the file url.dat. It contains your AIC Portal url and the corresponding AIC Portal UUID, like below example:
When going inside the AIC Portal UUID, we find the same folders than the Delivery Folder :