DMS editor timeout in Chrome - how reinstall safely?

[jeomiland+ 2]

Greetings

Was on the phone with client yesterday reviewing the site and the server slowed way down. Did a couple updates that may not have taken. Now cannot get back into the DMS editor for http://cassclayton.com/dev/  I can see the site in chrome and firefox but the background image is no longer there. Can get into dashboard in chrome and firefox. Cannot get into DMS editor in chrome - get "Oops, There may be an issue loading." error no matter how many times I try.  My internet connection is not the fastest, but I can access other sites I've built in DMS - just not http://cassclayton.com/dev/

My question is,
1) is there a safe way to reinstall DMS that will not trash the work done on the site? 
2) Is there a way to see if something in the database got corrupted and how to fix? Since I can't get into DMS editor, can't get to the Flush Cache page to try that.

Just turned on
define('WP_DEBUG', true);

Help!

Thanks

[Simon 248]

The error at the top of the page is from a plugin using php4 style contructs, very very out of date code. Find the plugin and disable that first, might be why the editor is erroring out.

[jeomiland+ 2]

Hi

Thanks for the reply and suggestion. Here are the active plugins:

bbPress  Version 2.5.8
BruteProtect  Version 2.5
DMS Professional Tools  Version 1.8.5
Envira Gallery  Version 1.3.6.2
Envira Gallery - Albums Addon  Version 1.1.4.1
Envira Gallery - CSS Addon  Version 1.0.5
Envira Gallery - Gallery Themes Addon  Version 1.0.5
Envira Gallery - Protection Addon  Version 1.0.4
Envira Gallery - Slideshow Addon  Version 1.0.4
Envira Gallery - Social Addon  Version 1.0.4
Envira Gallery - Standalone Addon  Version 1.0.7
Envira Gallery Lite  Version 1.3.4.7
GigPress  Version 2.3.12
Gravity Forms  Version 1.9.14
Gravity Forms Survey Add-On  Version 2.6
Groundwork  Version 1.2
Heartbeat Control  Version 1.0.3
PageLines Updater  Version 1.2.9
Photo Gallery  Version 1.2.63
Post video players, slideshow albums, photo galleries and music / podcast playlist  Version 1.137
ShareThis  Version 7.1
Spotify Master  Version 4.4.2.5
Wordfence Security  Version 6.0.20
WP User Avatar  Version 2.0.3
 

in case anyone has input on these.  Guess I'll have to turn them off and see which one(s) break it....   no time today...