I have tried having a look at the documentation link:
The documentation no longer allows me to select to go into "FREE" instead of "PRO" from Internet Explorer 11 (the dropdown does not drop down). [EDIT: This now seems to be working from IE 11, for whatever reason.]
I am most concerned to see (from Firefox) that formula support now appears to have moved from both versions into PRO-only. I initially adopted Handsontable (Free) as a client-side spreadsheet solution in good faith, understanding it to be an "Excel-like spreadsheet" as your advertising prominently claimed.
I have committed a lot of work to making Hot work, dealing with its large amount of bugs in the spirit of free software, which I would not have expected in a paid product. I was most surprised and disappointed to discover that its formula support (with Rule.js) turned out to be "experimental", especially given that it has been available for so long. Without formula support, Handsontable may be a "table provider", but it is not a "spreadsheet" --- can you name any other "spreadsheet" product in the world which does not have formulas? In your documentation's Typical use cases topic, for example, how could any of the items listed there be accomplished in the Free version if it does not have formulas?
I have been awaiting the "rewrite" just to provide basic formula support which actually works. (I can only conclude that most of your existing users do not use formulas, because as it has stood under Rule.js they simply do not work well enough to be used in practice; see my various posts for basic bug workarounds.) All my work will be wasted if you are not planning to have the Free version as a spreadsheet.
So, could you kindly clarify the situation wrt the Free version and forthcoming formula support, please?