Before June 24, 2020 Alpha+ products are offered with Unlimited Usage Plan and One Year Usage Plan models. The Unlimited Usage Plan one is full price forever use. The One Year Usage Plan one is lower price with one year usage period; when license expired can be renewed at $100/year or $190/perpetual. The One Year Usage Plan one is mainly for customers with short term RTK requirement.
Starting June 24, 2020, with the introduction of S100 product, all products on our web-store have changed to single price forever use model. We no longer offer One Year Usage model.