Hi,
Please see below for complete, but I had the same issue with a previous version of PL/SQL as well and thus thought it might be a setting.
Thank you
PL/SQL Developer
Version 12.0.7.1837 (64 bit)
01.120202 - 20 user license
Service Contract: None
Windows 10 Build 14393
Physical memory : 1,048,176 kB (156,404 available)
Paging file : 4,945,640 kB (1,565,100 available)
Virtual memory : 137,438,953,344 kB (137,438,481,952 available)
Parameters
C:\Program Files\PLSQL Developer 12\plsqldev.exe
Preferences
Session mode: Multi
OCI Library:
Use OCI7: False
Allow Multiple Connections: True
Preference Files
C:\Program Files\PLSQL Developer 12\Preferences\Default\Default.ini
C:\Users\Administrator\AppData\Roaming\PLSQL Developer 12\Preferences\Administrator\default.ini
License File
C:\ProgramData\PLSQL Developer\aalf.dat
Debug file
C:\Program Files\PLSQL Developer 12\PlSqlDev.elf
Plug-Ins
*Active Query Builder (C:\Program Files\PLSQL Developer 12\PlugIns\ActiveQueryBuilder.dll)
*PL/SQL Documentation (plsqldoc) (C:\Program Files\PLSQL Developer 12\PlugIns\plsqldoc.dll)
(* is Active)
Aliases
Homes
OraClient12Home1 (C:\app\client\Administrator\product\12.2.0\client_1)
DLLs
C:\app\client\Administrator\product\12.2.0\client_1\bin\oci.dll
TNS File
C:\app\client\Administrator\product\12.2.0\client_1\Network\Admin\tnsnames.ora
Using
Home: OraClient12Home1
DLL: C:\app\client\Administrator\product\12.2.0\client_1\bin\oci.dll
OCI: version 12.1 (12.2.0.1.0)
Oracle Database 12c Standard Edition Release 12.2.0.1.0
Character Sets
Character size: 1 byte(s)
CharSetID: 178
NCharSetID: 2000
Unicode Support: True
NLS_LANG: AMERICAN_AMERICA.WE8MSWIN1252
NLS_NCHAR_CHARACTERSET: AL16UTF16
NLS_CHARACTERSET: WE8MSWIN1252
Process
Working Set = 49,565,696
Memory = 52,785,232
GDI Objects = 709
User Objects = 517
Handles = 547
Monitor
PixelsPerInch = 96
Id = 0
Primary = True
Handle = 65537
Left = 0
Top = 0
Width = 1920
Height = 1080
MainFormOnTaskbar = False
