Running SqlTools on 64bit Oracle Client
SqlTools is an extremely light weight and fast windows frontend for Oracle. SQLTools++ is based on it with fixing some bugs. I started to use it from years ago in Windows XP era and love it much more than Oracle SQL Developer or Toad.
However, it requires Oracle Client installed. I always have installed Oracle Server for development at local, so this is not an issue to me.
About 3 years ago, I switched to Win 7 64bit and installed Oracle Server 64 bit for development. The SQLTools++ does not work any more with this error:
The application was unable to start correctly (0xc000007b).
Solution
Download a 32bit Oracle Instant Client.
Extract the Oracle Instant Client to a folder. E.g.
d:\oracle\instantclient_12_1\
.Add the folder into system PATH.
Start SqlTools (or SqlTools++) again. It can be run up successfully.