How to Change Default Program Association
After the installation ocd files are assicated with OCAD 32-bit version. For OCAD Orienteering and OCAD Mapping Solution there is also an 64-bit version.
To change to 64-bit do the following steps:
Go to any ocd file. Click the right mouse button on the ocd file to open the context menu and click Open with....
Check Always use this app to open .ocd files and click More apps
Scroll down and click Look for another app on this PC
Change to the OCAD program folder (usually C:\Program Files\OCAD\OCAD 20xx Orienteering) and choose the OCAD Orienteering_64bit file. Click the Open file.