Bot is crashing very often

[nomore]

It was working fine for weeks, then suddenly it has started to crash.
It won't run for more than 10-20 minutes before shutting down.

Logs look like:
2015-09-23 18:42:48 Start Clear [Box(16, 19)]
2015-09-23 18:42:48 Walk to center point = X: 990, Y: 1167.5, Z: 0
2015-09-23 18:42:49 Unreasonably stopped!!!
2015-09-23 18:42:49 Breakable found! a3dun_Keep_Exploding_Barrel-10304 52833
2015-09-23 18:42:51 Unreasonably stopped!!!

or
2015-09-24 07:55:01 [Box(10, 9)] direction = 
2015-09-24 07:55:02 Start Clear [Box(9, 9)]
2015-09-24 07:55:02 Walk to center point = X: 552.5, Y: 570, Z: 0
2015-09-24 07:55:05 pos after walk to center point = X: 556.9907, Y: 550.7915, Z: 0.1


Event viewer:
Faulting application name: D3Exploit.exe, version: 1.0.0.0, time stamp: 0x560291f9
Faulting module name: clr.dll, version: 4.0.30319.34014, time stamp: 0x52e0b784
Exception code: 0xc00000fd
Fault offset: 0x0008b990
Faulting process ID: 0x10c4
Faulting application start time: 0x01d0f625cabe82cf
Faulting application path: D:\Apps\D3Exploit\D3Exploit.exe
Faulting module path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Report ID: 9d1f7dae-621a-11e5-8277-74d435113ff3
Faulting package full name:
Faulting package-relative application ID:

not much useful information

Windows 8. 1
bot version 0. 9. 457

Any ideas?