Crash when closing

This has now happened several times when closing TOAD:

Application:

1.1 Start Date : Mon, 13 Feb 2017 13:12:24 +0100
1.2 Name/Description: Toad.exe - (Toad™ for Oracle®)
1.3 Version Number : 12.11.0.39
1.4 Parameters :
1.6 Up Time : 2 hour(s), 31 minute(s), 13 second(s)

Exception:

2.1 Date : Mon, 13 Feb 2017 15:43:37 +0100
2.2 Address : 00000000046E809F
2.3 Module Name: Toad.exe - (Toad™ for Oracle®)
2.5 Type : EUseAfterFreeError
2.6 Message : Application made attempt to call method of already deleted object: $0000000034B8CDB0 OBJECT [?] 144 bytes.
2.7 ID : 2C220000
2.8 Count : 1
2.11 Sent : 0

Call Stack Information:

|Methods |Details|Stack |Address |Module |Offset |Unit |Class |Procedure/Method |Line|

|*Exception Thread: ID=11540; Parent=0; Priority=-2 |
|Class=; Name=MAIN |
|DeadLock=0; Wait Chain= |

Comment=
00000040
00000040
00000040
00000040
00000040
00000040
00000040
00000040
00000040
00000040
00000040
00000040

I was able to reproduce this only once in several attempts, but I can see a problem in the code and have made a correction for next beta. Let me know if you continue to experience this.

Michael