2014.9.0.2011 service crashes registering eventid 7034

Avast service crashes after 5 seconds of run registering eventid 7034 in windows logs “Service avast! Antivirus suddenly interrupted” (not exact English).
Started to happen 2 days ago.
In avast about I see “Virus definitions: unknown” (not exact English).
In folder I see a bunch of minidumps like:
“c:\ProgramData\AVAST Software\Avast\log\unp3036188197205558.mdmp”

In crash.log bunch of messages:


System is shutting down or exception in service, exiting process now.
Unhandled exception: Address=70a64fb8 Code=c0000005 

WinDbg on crash dumps says:


The stored exception information can be accessed via .ecxr.
(125c.1100): Access violation - code c0000005 (first/second chance not available)
eax=09ac5940 ebx=00000000 ecx=00000006 edx=0000006c esi=00041164 edi=00000003
eip=779e70f4 esp=0af2dbf0 ebp=0af2dc00 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000246
ntdll!KiFastSystemCallRet:
779e70f4 c3              ret


0:068> .ecxr
eax=00000000 ebx=00000000 ecx=2e323931 edx=2e323931 esi=0b039ff0 edi=2e323931
eip=70fc4fb8 esp=0af2f3d8 ebp=0af2f3e8 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
msvcr110!strlen+0xc:
70fc4fb8 8a01            mov     al,byte ptr [ecx]          ds:0023:2e323931=??
0:068> kv
  *** Stack trace for last set context - .thread/.cxr resets it
ChildEBP RetAddr  Args to Child              
WARNING: Stack unwind information not available. Following frames may be wrong.
0af2f3e8 552941b7 2e323931 0b039c70 0af2f4d8 msvcr110!strlen+0xc
0af2f41c 5529311d 0af2f438 0af2f648 551f4b1a aswpatchmgt!PatchMgt_Stop+0x6bb67
0af2f428 551f4b1a 0b039c70 00002714 2e323931 aswpatchmgt!PatchMgt_Stop+0x6aacd
0af2f648 551f5785 05f3c270 05f3c258 0b094a30 aswpatchmgt+0x4b1a
...

Please do not propose to update to a newer revision it is useless (the reasons, are a diffrent subject).

Ideas to repair it are welcome.