I leave my computer on all the time and i recently got display fusion through humble bundle. I was running the free version of 5.1 for a long time before the bundle deal. Now im running 8.1.1 and it constantly crashes.

I'm running Windows 7 with i5, 32gb ram, gtx 970.

Next time it happens i'll update with crash report.

Problem Event Name:APPCRASH
Application NameisplayFusion.exe
Application Version:8.1.1.0
Application Timestamp:5817359e
Fault Module Name:clr.dll
Fault Module Version:4.0.30319.34209
Fault Module Timestamp:5348a1ef
Exception Code:c0000005
Exception Offset:00000000001ed79a
OS Version:6.1.7601.2.1.0.256.1
Locale ID:1033
Additional Information 1:95f2
Additional Information 2:95f2085641ea0f4e5dfd66a209d0e70f
Additional Information 3:0a85
Additional Information 4:0a85c0e1673d89b6804f9029b8bb6367

I did what you suggested but am still getting a lot of crashing:

Problem Event Name:APPCRASH
Application NameisplayFusion.exe
Application Version:8.1.1.0
Application Timestamp:5817359e
Fault Module Name:clr.dll
Fault Module Version:4.6.81.0
Fault Module Timestamp:5584e818
Exception Code:c0000005
Exception Offset:00000000000077bc
OS Version:6.1.7601.2.1.0.256.1
Locale ID:1033
Additional Information 1:2529
Additional Information 2:252964d6384b41fe7adbf4e904e9e7bd
Additional Information 3:2e0c
Additional Information 4:2e0c0de32e36e1a79e1926e66627ad04

Here are the logs and the last crash info:

Problem signature:
Problem Event Name:APPCRASH
Application NameisplayFusion.exe
Application Version:8.1.1.0
Application Timestamp:5817359e
Fault Module Name:clr.dll
Fault Module Version:4.6.1055.0
Fault Module Timestamp:563c12de
Exception Code:c0000005
Exception Offset:000000000035afe8
OS Version:6.1.7601.2.1.0.256.1
Locale ID:1033
Additional Information 1:95f2
Additional Information 2:95f2085641ea0f4e5dfd66a209d0e70f
Additional Information 3:738e
Additional Information 4:738e0c5f8bcd16ccd123443f0af5a6d7

deskscapes cant be the issue. i installed it thinking that the crashing was because of the desktop background switching was causing display fusion to crash. but even after installing deskscapes the crashes continue. i dont mind removing deskscapes but the crashing was happening prior to installing it.

Still the same issue. Im thinking of doing a clean install, because ive suddenly been having issues with a lot of different programs. Will report back when i've done the reinstall and tested displayfusion again.