I'm hesitant to get in the middle of this, BUT I think Serif did the right thing to support its customers; the company deserves congratulations instead of criticism.
They made a decision with good intentions that, in retrospect, didn't meet the needs of users. Based on the feedback they received, instead of digging in their heels and telling users "it's our way or the highway", they shifted gears and released standard Windows installer versions.
Having been an embedded software engineer for 40 years, I can tell you that, although installation packages don't add perceived value (they're just supposed to work!), they can take a disproportionate amount of time and effort to develop and test. So understandably, the updates weren't available immediately.
I purchased version 2 of all three programs while they were discounted. Serif made it clear that they were working on a fix for Microsoft's questionable installation paradigm, so I continued to use version 1 until the updated installers were available. When they were, the updates installed cleanly and work flawlessly.
I appreciate that Serif has made such a capable software package available for such a reasonable price.