Crawling Error After Disabling Mingle Forum

[chinekop]

After I have moved my website to another host, Mingleforum has started working weird so i just decided not to use it. Everything was fine but after disabling Mingle forum from plugins page, I found a lot of 404 errors while i was checking my crawling stats via Google Webmaster Tool. I tried to disallow some of them with robots.txt but it still drives me crazy.
I get crawling errors like this :

sitename.com/forum/forumcategory/forumname
sitename.com/index.php/forum
a lot of pages ending with /?mingleforumaction=profile&id=1/ (which i have disallowed from robots.txt

and a lot of other pages like sitename.com/forumcategoryname/forumsname/blogpost’sname (around 750 not found pages like this)
I was using Latest Forum Posts widget on my footer. so now i have like 750 pages with 404 error (crawling error) which really doesn’t exist.

You can check the website : https://www.cingundemi.com

Any help would be appreciated! Thank you!

https://www.ads-software.com/extend/plugins/mingle-forum/

[chinekop]

This plugins ruined my site’s ranking on search engine with a lot of crawling errors. Thanks for your “great” plugin and for your kindly help.