Decompilers for Nullsoft / 7-Zip?

[DARO75]

Decompilers or Unlocker for Nullsoft / 7-Zip read-only files?
https://nsis.sourceforge.io/Can_I_decompile_an_existing_installer

do you have the possibility to create such a tool?

[myfreeer]

What is the Nullsoft / 7-Zip read-only files? Could any minimal example be provided?

[DARO75]

Example:

http://download.notepad-plus-plus.org/repository/8.x/8.4.3/npp.8.4.3.Installer.exe
http://download.notepad-plus-plus.org/repository/8.x/8.4.3/npp.8.4.3.Installer.x64.exe

[myfreeer]

Deleting file form such archived files often means rebuilding the archive. 7-zip can not create nsis package, so it can not delete files form it

[DARO75]

I was hoping you could use your skills to write a little tool that can do that!