Change from 32 to 64bit, registry not addapted

[Orca75]

Description of the Issue

When I reinstalled npp 7.5.4 to the 64bit version, the registry entry for HKEY_CLASSES_ROOT\Applications\notepad++.exe\shell\open\command was not changed.

So it was not possible to assing an extension with "Open with..."

Steps to Reproduce the Issue

Expected Behavior

C:\Program Files\Notepad++\notepad++.exe

Actual Behavior

C:\Program Files(x86)\Notepad++\notepad++.exe