Do not remove the update zip

[VladicusMagnus]

There is a need to leave the old versions CDDA.

Suggestion:
Do not delete the zip archive after unpacking. In Settings, add the choice of the directory where the archive will be copied or initially loaded. Also, add an option to allow or disable such an action. By default, this option is turned off (I, or those who need it, will turn it on themselves). Remroy has a similar solution.

For example, like this: