Install from version 4 backup and then upgrade to newest version
Installation and Configuration
No problem by us you helping others out, feel free.

No you don't need to go to 5 before going to 6.


.event_attend_button {
- background: rgba(0, 0, 0, 0) none repeat scroll 0 0;
- border: 1px solid rgba(255, 255, 255, 0.4);
- border-radius: 5px;
- color: white;
- padding: 8px 10px;
+ font-family: 'Nunito Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
+ background: #FFFFFF linear-gradient(#FFFFFF, #EEEEEE) repeat scroll 0 0;
+ border: 1px solid #CCCCCC;
+ border-radius: 2px;
+ box-shadow: none;
+ color: #555555;
+ padding: 3px 5px;
}
jrCore_register_module_feature('jrCore', 'css', 'xxYourSkin', 'overrides.css');