All-In-One Protector is available as a subscription with quarterly or yearly payment option.
The Cloud Edition comes as a full version, but you only make small monthly payments. If the event or project is over you just cancel the subscription.
This ensures that you always work with the latest technology available. Since all plans are billed on a monthly or quarterly basis, you may cancel at any time and will never be charged again. In case of increasing requirements, you may just switch to another All-In-One Protector version.