Error with 'setDefault' in app.vue

I cloned the example and followed all the add, remove and npm instructions mentioned in the Readme.md. On first run it throws the following error:
```
Exited with code: 1
.....meteor\packages\meteor-tool\1.4.3_2\mt-os.windows.x86_32\dev_bundle\server-lib\node_modules\fibers\future.js:280
throw(ex);
TypeError: Cannot read property 'setDefault' of undefined
at imports/ui/App.vue:27:1
```
Not sure what's causing it. Perhaps something changed in the recent Session package?
I changed the faulting line from to: ` Session.setDefault("counter", 0) ` to: ` Session.set("counter", 0) ` which made the app run fine.

**UPDATE**
I changed it back to the orginal ` Session.setDefault("counter", 0) `, but I moved it into the 'beforeCreate' lifecycle hook, and that seems to work fine.