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IT insisted I relinquish my old PC w/ Win7 & BricsCAD18.
And gave me a new PC w/ Win10 & BricsCAD19.
How do I migrate all the BricsCAD18 customization files & settings over to the new box w/ BricsCAD19?
Install v18 on the new machine, and copy any custom files to the same folders on the new machine. Then the v19 installer will offer to transfer all your custom settings to the new version (assuming it works the same way as previous version installers).
Don't forget to deactivate it on the old machine so you can use the license on a different machine. If the v19 is an upgrade, you might need to do that to get the new version activated.