I deleted my .dat file extention, will it still work if I re-create it

[Axmann8]

So, I was having problems with my .dat file type icon, and in frustration trying to get rid of the icon and start all over again, I deleted the file type in the registry.

Will this cause problems in the future, even though I re-added it in the registry? I don't see any problems with them right now, but I didn't know if I might have troubles in the future due to this.

 

[Arc]

To change the icon, you are to change the program association for .dat file.

If you add it back, there should not be any problem.