[Typo3] Crash after instaling w4x_backup extension

[Piotr Burda]

Hi
I` just instaled w4x_backup ver. T3X_w4x_backup-0_8_1-z.t3x on typo3 3.8.0
after installing both my BE and FE are blank.
What should i do to resto re my typo3 ?

for the moment i`ve commneted in localconf.php line with w4x_backup
# $TYPO3_CONF_VARS['EXT']['extConf']['w4x_backup'] = 
'a:1:{s:11:"w4x_backup.";a:9:{s:14:"mysqldump_path";s:9:"mysqldump";s:10:"mysql_path";s:5:"mysql";s:9:"7zip_path";s:29:"c:\\Program 
files\\7-zip\\7z.exe";s:8:"tar_path";s:3:"tar";s:11:"backup_path";s:9:"typo3temp";s:11:"date_format";s:9:"Y-m-d 
H:i";s:10:"max_number";s:1:"3";s:8:"max_days";s:1:"0";s:8:"excluded";s:0:"";}}'; 


and deleted w4x_backup from $TYPO3_CONF_VARS['EXT']['extList']

but it`s not working

Best regards
Piotr Burda