YES try this... I have TWO copies of GTA5 one for LSPDFR and mods and one for ONLINE play. All you have to do is RENAME your online folder to the regular GTAV path D:\Steam\steamapps\common\Grand Theft Auto V (my path starts wit "D" yours may be different)
And rename your LSPDFR folder to Grand Theft Auto V LSPDFR just so you can keep them separate and not update your LSPDFR folder...
NOW start up steam and UPDATE YOUR VANILLA GTAV ONLINE GAME let the whole thing update take off OFFLINE mode let the whole thing have full access and update it just as the game wants to. Once you have the game fully updated with the latest DLC go into an online session and run around then EXIT GAME.
Finally go back into your main GTAV folder and just CHANGE THE FOLDER NAMES back the way you had it, I just change my online folder to say ONLINE and my LSPDFR folder back to Grand Theft Auto V which is the folder the game launches from, NOW start up RAGE and BOOM your back into the game and Rockstar WILL NO LONGER WANT TO UPDATE UNTIL THE NEXT DLC in which case you will do the EXACT same steps again.
I hope this helps it saved me TONS of time having to RE-update everything and wait on others, I can just play my game with all my beautiful working mods and no crashes and no updates!!!
-MERRY CHRISTMAS!!!