nppapplication.exe is a program which is probably NOT a virus or malware. So, if nppapplication.exe is on your computer, it is probably ok, and will NOT cause problems. Even if your system is virus-free, it is still recommended to run a well-known antivirus with a good track record, in order to defend your system against viruses and malware.
Usually, the default name and path where the program is stored is
C:\Users\UserName\AppData\Roaming\NotepadPlusPlusApp\nppApplication.exe.
The MD5 checksum for this program is 038a89f2a991df65009918e466223da5.
This program does NOT operate as a Windows service. This is usually a good sign.
This executable runs as a 32-bit program. It can not exploit the entire set of features of current computer processors. This ordinarily happens because the authors did not bother to upgrade it to 64-bit code.
A digital signature is missing from this program. The authors did not sign it. This is probably bad.
This executable is registered to start when your computer boots. Yes
It has an uninstall string in registry, which is a good sign. si are uninstall.