Beta version build problem

I’m using Unity Pro Version. I have used 5.4.1 version, and have a try 5.5.0b2 beta version for the first time. I loaded a former project without a backup in beta version by mistake then it failed to build. So I loaded that project again in 5.4.1 version but since that time, a crash occurs in any conditions. It also can’t build. Can I restore my project? If there is a solution, please notice to me. Some of crash logs are attached.

Unity Editor [version: Unity 5.4.2f1_94e3a60ee258]

Unity.exe caused an Access Violation (0xc0000005) in module Unity.exe at 0033:403863f8.

Error occurred at 2016-10-19_151724. C:\Program Files\Unity\Editor\Unity.exe, run by rock2s. 24% memory in use. 16319 MB physical memory [12266 MB free]. 18751 MB paging file [12581 MB free]. 134217728 MB user address space [134215746 MB free]. Read from location 00000008 caused an access violation.

Context: RDI: 0x07e28250 RSI: 0x00000001 RAX: 0x00000000 RBX: 0x07e28250 RCX: 0x07e28250 RDX: 0x005fdfd0 RIP: 0x403863f8 RBP: 0x005fdfe9 SegCs: 0x00000033 EFlags: 0x00010202 RSP: 0x005fdf70 SegSs: 0x0000002b R8: 0xfffffffd R9: 0x00000000 R10: 0x13b26250 R11: 0x005fe220 R12: 0x07dfb160 R13: 0x07dfb160 R14: 0x00000000 R15: 0x00000000

Bytes at CS:EIP: 48 8b 48 08 4d 03 c0 48 8b c2 42 0f 28 0c c1 66

----------........

Module 1 C:\Windows\SYSTEM32\MSVCR100.dll Image Base: 0x62bb0000 Image Size: 0x000d2000 File Size: 829264 File Time: 2011-06-11_011538 Version: Company: Microsoft Corporation Product: Microsoft® Visual Studio® 2010 FileDesc: Microsoft® C Runtime Library FileVer: 10.0.40219.325 ProdVer: 10.0.40219.325

Module 2 C:\Windows\SYSTEM32\MSVCP100.dll Image Base: 0x62cc0000 Image Size: 0x00098000 File Size: 608080 File Time: 2011-06-11_011538 Version: Company: Microsoft Corporation Product: Microsoft® Visual Studio® 2010 FileDesc: Microsoft® C Runtime Library FileVer: 10.0.40219.325 ProdVer: 10.0.40219.325

NOT FILLED

( SFDC Lead Id: 00Q2000000sw6aJEAQ)