Trademark?
No,there are no TradeMark violations by you owning the name,lol. PhotoShop is a retail product that is sold at many stores,a la Staples,Office Depot etc.So if you are planing to sell the product using that domain and/or link to it there are no trademark violations.
I do not understand why so many people think by registering a "TradeMark" name/domain name you can be sued.This is true though in many cases,but the trademark owner will have to prove that you registered the name in bad faith,intent what have you.They can not sue until the website of the domain is developed.So dont worry,keep the domain.
Now if PhotoShop offered an "Affiliate" program then you will not be able to use the domain.But if you are a retail seller of the software then you can use the name and if worse comes to worse,you can always foward the name to a non-trademark domain name.There are many ways to beat the system..lol.So in my opinion if you find another "TradeMark" domain,GRAB IT!
The name is worth GOLD! Keep it! LATER!