If you want to avoid situations like this going forward, try to avoid programs which are under commercial licensing. Basically anything that asks you to sign a
EULA. Otherwise it will always be at risk of one day becoming paywalled or restricted in some fashion.
Other commenters will probably load you up with recommendations, so instead I would like to share an alternative to password managers in general:
You may also consider memorizing a password algorithm. A set of mental steps which can take some input, such as the service name or domain, and produce a unique password.