This will set 1 for registry key value : HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled = 1
sxppkg.exe.manifest is correct in version 14.6, so the following steps 2 and 3 must be done only in version 14.5 (not 14.6).
(ONLY 14.5) - Copy the file C:\Program Files (x86)\CA\DSM\Bin\sxppkg.exe.manifest as sxppkg.exe.manifest_ORI
(ONLY 14.5) - Edit file C:\Program Files (x86)\CA\DSM\Bin\sxppkg.exe.manifest and add following section at the bottom just before the last line "</assembly>"