Head to ⚙ Settings > General, and at the bottom of the page you'll find the following options:

There is also an option in ⚙ Settings > Quoting to control when your quotes expire:

Head to ⚙ Settings > General, and at the bottom of the page you'll find the following options:
There is also an option in ⚙ Settings > Quoting to control when your quotes expire: