08-16-2020, 02:02 PM
@Andy Journey I wouldn't normally bump a year-old topic, but I recently set up this extension on my new computer and ran into the exact same error message. I Googled it, and this topic happened to be the first search result! So in case someone else gets a "Failed to locate extension data file" error in GM 8...
Click on Resources -> Extension Packages. Click on the extension you want, and click the Install button. You'll need to open the .GEX file when prompted. This will automatically generate the appropriate .DAT file.
Click on Resources -> Extension Packages. Click on the extension you want, and click the Install button. You'll need to open the .GEX file when prompted. This will automatically generate the appropriate .DAT file.
Course clear! You got a card.
![[Image: CourseClear.gif]](https://dl.dropbox.com/s/d5mcpm4nmt0gd14/CourseClear.gif)