Just thought I would mention something. RC is release candidate, it is the new advanced experimental features. This is meant for technically inclined users who can understand it and use to help resolve further issues. Do not use it if you don't understand the risks, and don't complain if it's too complicated and you can't ask for help from advanced users or can't understand their explanations. Rather wait for stable client.

Also, coin control is advanced feature, but useful. If I understand correctly, it is used to select received coins e.g. you can select the 1000 you sent to yourself for masternode or you can select the 1.00 you received from masternode payment separately. You tick the specific received coins and you can further expand groups e.g. all masternode payments or -> individual.