Rejoice brethren, for we are all Akane's dirty little sluts~ (And yes, ditto to voicing as always, I just don't know how an indie game dev who charges nothing could afford voice acting, plus the filesize it would add, oof)
If you're on PC, just download and play, the saves should be there. (RenPy games tend to create a backup saves folder in your computer's AppData folder, though I think this game doesn't, at least last I checked). I don't play on mobile, but I suppose the same advice for both versions - download new version without deleting the old. Mobile you should probably move saves over before deleting the old, PC I think you can just delete it.
I have no idea. Since it happens to some people but not most, I can only assume it's related to your internet, but I don't know what specifically. (我不知道。由于这种情况只发生在一些人身上，但不是大多数人，我只能假设这与你的互联网有关，但我不知道具体是什么。)
Still not sure what you're referring to, things "in store that can only be purchased with sponsorship that is not in my email"? Do you mean cheat codes? Because either Patreon or the Discord will easily have those listed, but I'm not a Patron so I don't know exactly where.
I don't know what you mean by "key", but the download link is above this comment section. There should also be a link in the Patreon posts you unlock by joining. (我不知道你说的“密钥”是什么意思，但下载链接就在这个评论部分上方。 你通过加入解锁的 Patreon 帖子中也应该有一个链接。)
Copy-paste or cut-paste from one location to the other. They're stored in the "game"->"saves" folder within the Goddesses' Whim folder itself. Most RenPy games also back them up in your Local Disk->Users->[Your Name]->AppData->Roaming folder, but doing a search just now, I can't find it... hmm.
I hope so, but it doesn't seem likely. Hell I've only personally seen one game do it (haven't played that many though), Raven's Quest, and in that case it was a very fast cycle, with no consequences.
As you can see from the dates of the Development Log directly above this comment section, Patrons get updates a week early, then everyone else at the same time, indeed the 7th. And as is also mentioned above, next update is coming either late August or Septermber 7. It's later than usual because NCrow took a month vacation (well-deserved).
The game is free, so "compensation" for NCrow taking a vacation isn't quite right. Unless he decides it's now a working vacation, let the man enjoy some time off :)
Copy-paste or cut-paste from one location to the other.