Question: After renaming my heroku app from the heroku website, whenever I cd to its directory in a terminal and run any heroku command, I get `App not found`. Does anybody know of a way to remedy this?

Answer: 
Try to update the git remote for the app:

```
git remote rm heroku
git remote add heroku git@heroku.com:yourappname.git

```
```
git remote rm heroku
heroku git:remote -a newname

```