How to Change Default Program Association
After the installation ocd files are assicated with OCAD 12 32-bit version.
To change to 64-bit do the following steps:
Open the Windows Explorer and select an ocd file. Click the right mouse button to open the context menu and click Open with....
Check Always use this app to open .ocd files and click More apps
Click Look for another app on this PC
Change to the OCAD 12 program folder and choose the OCAD 12 EDITION_64bit file. Click the Open file.