Your Pro payment entitles you to free updates & email support for up to 6 months...so, when your 6 months are almost up you'll get this email inviting you to buy Pro again for the reduced price.

But you don't have to buy again Whatever Pro versions you've downloaded & saved during the 6 months are yours to keep & use for as long as you like.The original Pro purchase is a one time payment, for 6 months worth of LW Pro versions. It's up to the user to save & back up all Pro versions that they download during the 6 month period.

You should only buy Pro again if you want further Pro updates in the future