[SuperSU] Taomyn:
[MENTION=631273]Chainfire[/MENTION], as 2.61 to 2.62 on my N6/N9 both failed to update the app to 2.62 I didn't quite get a proper full log after boot as you recommended, but did get this in case it helps:

12-10 22:21:26.205 W/PackageManager( 1424): Failed to parse /data/app/eu.chainfire.supersu-1: Application package eu.chainfire.supersu found at /data/app/eu.chainfire.supersu-1 but expected at /data/app/eu.chainfire.supersu-3; ignoring.
12-10 22:22:57.116 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package com.keramidas.TitaniumBackup
12-10 22:22:57.116 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package com.rs.autorun
12-10 22:22:57.120 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package org.fdroid.fdroid
12-10 22:22:57.120 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package ru.org.amip.ClockSync
12-10 22:22:57.123 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package jackpal.androidterm
12-10 22:22:57.125 W/PackageManager( 1424): Not granting permission android.permission.REBOOT to package eu.chainfire.supersu (protectionLevel=18 flags=0x38083e04)
12-10 22:23:06.216 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package com.keramidas.TitaniumBackup
12-10 22:23:06.216 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package com.rs.autorun
12-10 22:23:06.229 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package org.fdroid.fdroid
12-10 22:23:06.231 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package ru.org.amip.ClockSync
12-10 22:23:06.234 W/PackageManager( 1424): Unknown permission android.permission.ACCESS_SUPERUSER in package jackpal.androidterm
12-10 22:23:06.236 W/PackageManager( 1424): Not granting permission android.permission.REBOOT to package eu.chainfire.supersu (protectionLevel=18 flags=0x38083e04)
12-10 22:23:42.392 I/ActivityManager( 1424): Start proc 3946:eu.chainfire.supersu/u0a132 for broadcast eu.chainfire.supersu/.BootCompleteReceiver
12-10 22:23:42.540 W/System ( 3946): ClassLoader referenced unknown path: /data/app/eu.chainfire.supersu-3/lib/arm64
12-10 22:23:42.646 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] detect(261)
12-10 22:23:42.909 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] su --> 262
12-10 22:23:43.069 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] su daemon --> 262
12-10 22:23:43.074 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] sugote --> -3 / -3 / 0
12-10 22:23:43.332 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] supolicy --> 262
12-10 22:23:43.425 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] sukernel --> 262
12-10 22:23:43.446 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] su old --> -2
12-10 22:23:43.537 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] app_process --> 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] sdk == 23
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] su_bin_only == 1
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] xbin_only == 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] selinux_enforcing == 1
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] is_daemon_mode == 1
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] is_sugote_needed == 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] is_supolicy_needed == 1
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] context_toolbox == u:object_r:toolbox_exec:s0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_install == 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_backup == 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_daemon == 0
12-10 22:23:43.568 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_sugote == 0
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_supolicy == 0
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_sukernel == 0
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] want_app_process == 0
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] have_recovery_context == 1
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] wantInstall() == 0
12-10 22:23:43.569 D/SuperSU][APK( 3946): [SuperSU][APK][Installer] canInstall() == 1
12-10 22:23:47.215 I/ActivityManager( 1424): Killing 3946:eu.chainfire.supersu/u0a132 (adj 15): empty #17
12-10 22:24:16.057 I/ActivityManager( 1424): Start proc 5323:eu.chainfire.supersu/u0a132 for broadcast eu.chainfire.supersu/.UserPresentReceiver
12-10 22:24:16.115 W/System ( 5323): ClassLoader referenced unknown path: /data/app/eu.chainfire.supersu-3/lib/arm64
12-10 22:24:22.338 I/ActivityManager( 1424): Killing 5323:eu.chainfire.supersu/u0a132 (adj 15): empty #17

I'll try again next update