If you are having problem in starting up Exploratory, and you have unzipped downloaded Exploratory.zip by 9zip, you are probably hitting this issue.
We found that 9zip does not extract Exploratory.zip properly, and because of that, if you start Exploratory.exe, you will get an error that looks like this.
To avoid this, you can simply unzip Exploratory.zip by some other means like “Extract All” right-click menu.