Please go to the Apple logo at the upper left of your computer screen to About This Mac and give me this information:
Are you saying you imported data from an iMac? Your question is a little confusing...
I suggest you use the cloud sync instead of manually moving your data.
Do you mean the console app on the Mac?
There is no reason to clear that it is just a log file it is not affecting your iBank app. I suggest you upgrade the older version to version 5 then transfer your data.
Sorry I will have to opt out of this question it will be open to other experts who may have more experience with that app.