Patellar tendonitis

I have patellar tendonitis on my right knee. It doesn’t hurt when I run, only after getting up froma sitting position after my knee has been bent for a long while.
I took 6 weeks off and started slowly with1 mile a day.
I stopped again last week because I feltmy knee was not getting better.
I’m now going to the gym and working out calves, hamstrings, abs, quads, andupper body (and back extensions).
How long should I stay away from running? Any advice on what else to do?Also, I saw your ads for the Chopat and the other kneebraces.
I’m interested in buying one but I wonder if it won’t simply mask discomfort while I damage my knee?