One of my plugins have some files that are inactive. I did some googling and found out that this is caused by editing files while the plugin is still active. OOPS, guilty.
I then deactivated and deleted the plugin and reinstalled it. But the same files are still displayed inactive. Now according to this, similar question, the files will be inactive and the only meaningful file is the main plugin file. However, when I try to edit CSS file which is inactive, the changes does not reflect on the front end.
What should I do? The plugin was developed by my developer in which he may have provided me with a copy of the broken plugin when I told him the problem instead of the original backup. (He may not even have the 'original' backup)