I made a simple zpaq file explorer. You can preview a version, a folder or a file by doubleclicking the item or extract the data to a custom path.
This aplication uses zpaq.exe to extract the files information and data, therefore, the file must be in the same folder of the aplication. Tested on Zpaq 6.37 and only by adding versions to the same file, no other commands tested.
It can work wrong in archives with a lot of versions and/or files and it is on preliminary testing stage. The aplication comes with an example file to test.
Please use it at your own risk and responsability, and only with test files (never with originals or important and sensitive data) because the aplication at this time could be unstable and can work wrong.
Thank you again to Matt Mahoney by the creation of Zpaq.
Greetings.