plugins: Styles – Styles Twentyfourteen (with WP 4.4.2)

Hi,
I actually fall into problems with the STYLES & 2014STYLES plugins;
with actived STYLES plugin I am not able to use personalisation of 2014-theme ! With deactivated plugin personalisation works, but I lost my modifications. It works just yesterday, but now it won’t !
I got PHP errrors like :

[19-Feb-2016 14:16:06 UTC] PHP Notice: Undefined property: SFM_Group_Standard::$menu_css in …/wp-content/plugins/styles/classes/styles-font-menu/classes/sfm-group.php on line 33

and

PHP memory errors like

[19-Feb-2016 14:24:23 UTC] PHP Fatal error: Out of memory (allocated 34603008) (tried to allocate 167936 bytes) in …/wp-includes/class.wp-scripts.php on line 94

while memory limit of host is normely 120M (as PHPINFO is saying).

Any idea ???

https://www.ads-software.com/plugins/styles/