Not a bug but worth mentioning in FAQ; Once you get a "limit reached" message clicking "start export" will make it delete all its progress.
Closing and reopening will result in "failed to get user info from Tumblr"
Whoops, definitely an oversight–thanks for flagging it! I’ll add a note to the current docs, and I’ll try to get an update out with a fix this week 😊
Just wanted to follow up–version 1.1.0 is now available, which adds the ability to resume unfinished exports. Thanks again for reporting this!