We have several bids in from experienced contractors to do the Goldenseal Pro work, and will choose someone within a week or so. The previous contractor used the QT framework, but this will be a simpler, Mac-only update. Most likely it will take about 3 months to finish.
QT had the advantage of providing Mac and Windows versions from the same code, but it ended up being just too cumbersome to connect it with our existing code. However, we may still use QT for mobile apps next year, since it builds for both Android and Apple iOS. Those will be much simpler, and we will build them from scratch.