@Kevin-Lawrence It depends, I think Magix usually has a free upgrade grace period of two or three weeks if you contact customer support at firstname.lastname@example.org but not longer.
On the other hand, I don't think the new version has any new features beside external effects integration and a new plugin. Not really worth the upgrade. So I would suggest you stay with your version and skip two or three years without an upgrade.
So my experience indicates that they are not "very flexible". There is only one way this can be accomplished at their company, according to sales, and it is inflexible. Flexible would look like this:
1-They have a license system whereby the product line related to me carries a static license number which they can manage on their end with a computer (the majority of companies I've dealt with employ this). OR
2-They cancel my current SFS 16 license and issue one for 17. OR
2-They cancel the order entirely and refund it, then I buy the v.17 suite (clunky, but OK) INSTEAD
They want me to buy version 17, show them proof I have purchased, then they would cancel the version 16 (and supposedly refund) Since 1986, when I first began buying software I have never experienced this rigid and unfriendly way of handling a situation like this. Flexible they are not. They have successfully ended my desire to continue doing business with them.
@Kevin-Lawrence So you bought SF16 without the included free upgrade to SF17? Like I already wrote, these offers are usually limited to a timeframe of two or three weeks before a new version comes out. And it's explicitly stated in the offer that SF17 is included as a free upgrade.
Just buying the software one or two moths before a new version comes out will not get you the new version automatically. This was never the case with Magix.
The prices are usually much cheaper (about $100) near the end of a version. Over the last two or three weeks the prices rise again, but include the next version for free. So, it could be that you got your version of SF16 for $100 less than usual, but without a free upgrade. But that's only my speculation and I'm not sure since I don't know what you paid.
On the other hand, yearly upgrades are often not necessary because there are not many new features. I skip usually three or four versions.