Okay, I’ll try that. I had tried the plugin, but got an error. The primary theme is buddypress enabled, so I thought maybe there was conflict there.
“The primary theme is buddypress enabled,”
@zenzard – what primary theme? Per your post, you’re using “Ecolines” theme from repo, but I can’t find any such theme there https://wordpress.org/extend/themes/
I hope I explain this right. The active theme on my site is Detox, which is bp enabled. However, I am using the Page Theme plugin so I can use different themes on different pages. The theme I want to use on two different pages is the Ecolines free theme (https://wordpress.org/extend/themes/eco). So it’s that theme where I want the bar to show up. (live link: http://herppeople.com/herpauctions/).
I have installed the plugin using the corrected file above, and this is the error I get….
Fatal error: Cannot redeclare bp_dtheme_post_update() (previously declared in /home/***MY SITE****/public_html/wp-content/plugins/buddypress/bp-themes/bp-default/_inc/ajax.php:113) in /home/*****MY SITE****/public_html/wp-content/themes/Detox/_inc/ajax.php on line 92
So I think the fact that my primary theme, Detox, is bp enabled, is conflicting with the plugin. Clear as mud? LOL!!!!!
@zenzard yup, clear as mud. Never used Page Theme plugin. You might want to contact Page Theme plugin author to get it to work with two BP compatible themes. On the other hand, it looks to me that it’ll be much easier and more future-proof to create Page Template/s instead.
Page templates? What are those? If I can keep my CSS/images then I’m game! 
@zenzard
Everything you ever wanted to know about page templates can be found here:
https://codex.wordpress.org/Templates
