Hi Ivan,
Sure. The "Prices" data type is showing you the recorded closing prices. This is also open, high, low, and volume if available. The "Value" column is simply showing what the value of that investment is, given that recorded closing price, and the number of shares you own, which is based off your recorded transactions. You aren't actually seeing any transactions under this data type, only pricing information, and the resulting value.
We do have a tutorial on the Data Register, which you might like to watch:
http://www.fundmanagersoftware.com/tuto ... video.html
The online documentation for the Data Register is available here:
http://www.fundmanagersoftware.com/help ... ldata.html
When you edit a transaction, that does not change your recorded closing price. The transaction price and closing price are independent. If you record a new buy/sell and there is no recorded closing price, Fund Manager will use your transaction price to record a closing price. However, if there is already a closing price recorded for a date, editing or adding a new transaction on that date will not affect the already recorded closing price. You can add/edit/delete closing prices in the data register, under the prices data type.