VST Issue Waves GTR3.5 Waves v7

GTR suddenlt stopped working and disappeared from my insert list.
Reinstalled, ipdated iLok client and drivers.
Now it appears in my plug in list but causes an error if I try to use it as an insert/
It (GTR) opens fine as a stand alone program from my desktop.
The error I get as an insert refers me to the cubase5.log file which says:
Cubase5.exe Version 5.0.1 Build 147 - 1.9.2010 20:41

Timestamp is 49cab05d (Wed Mar 25 18:29:49 2009)
C:\Program Files\Steinberg\Cubase 5\Cubase5.exe

Exception code: C0000005 ACCESS_VIOLATION
Fault address: 7C9108F3 01:0000F8F3 C:\WINNT\system32\ntdll.dll

EAX=0f804c10 ECX=07ce5b10 EDX=bd0da909 EBX=07ce0178 ESI=0f804c08 EDI= 07ce0000
EBP=0012ed40 EIP=7c9108f3 ESP=0012ec84 CS= 0000001b SS= 00000023 Flags=00010207
DS= 00000023 ES= 00000023 FS= 0000003b GS= 00000000

Float Save:
Control Word= ffff027f Status Word= ffff4020 Tag Word=ffffffff
Error Offset= 02e013a7 Error Selector=05d8001b
Data Offset= 00000000 Data Selector= ffff0023
Cr0NpxState= 00000000

Bytes at CS:EIP:
89 02 89 41 04 56 8b 75 c8 56 e8 ba fd ff ff 8b
45 e4 01 46 28 83 4d fc ff e8 5c 00 00 00 33 db

Call stack:
Address Frame
7C9108F3 0012ED40 wcsncpy+374
082D266D 0012ED80 0001:0002166D C:\Program Files\Steinberg\Cubase 5\Components\VSTPlugManager.dll
082B5D37 0012EDC0 0001:00004D37 C:\Program Files\Steinberg\Cubase 5\Components\VSTPlugManager.dll
00D642A5 13A76F90 0001:009632A5 C:\Program Files\Steinberg\Cubase 5\Cubase5.exe

Which is beyond my ability to decipher except the date which doesn’t seem to fit so I don’t even know if the above applies…
Any assistance appreciated…