Any unused portion of the free trial period will be forfeited when you purchase a subscription.
A trial period of 1 month is provided for you to try out the Pro Features and of course you can always stop renewing your subscription or stop the trial subscription.
The subscription runs for 12 months and starts with a one month trial period and auto-renews at the end of the 12 month period.
The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
To do a search for IFR routes, validate IFR routes with Eurocontrol and file them afterwards you need to upgrade with a subscription.